Revolusi industri 4.0 memunculkan mata uang digital cryptocurrency, serta penambang (miner) yang berfungsi sebagai pihak penengah untuk memvalidasi tiap transaksi. Penelitian ini bertujuan untuk mengetahui mekanisme Cryptomining dan mengetahui kegiatan Cryptomining dalam tinjauan akad ijarah. Ada pun tahapan-tahapannya adalah; merakit mining rig, screening koin, pengaturan aplikasi, memilih pool, lalu melakukan proses menambang disertai maintenance, hingga akhirnya menerima imbalan/reward. Penelitian dilakukan dengan metode kualitatif. Penulis mengumpulkan data dengan cara terjun langsung sebagai pelaku Cryptomining. Peneliti mengambil referensi dan poin-poin yang terdapat dalam fatwa-fatwa MUI untuk melakukan analisa dan pengembangan hipotesis dalam penyetaraan rukun-rukun akad Ijarah terhadap proses dalam kegiatan Cryptomining. Hasil penelitian ini menunjukkan bahwa unsur-unsur kesetaraan kegiatan tambang uang digital (Cryptomining) sebagian besar sesuai dengan rukun-rukun akad Ijarah. Para Miner disetarakan dengan Mu’jir, pengguna cryptocurrency sebagai musta’jir, transaksi yang terproses sebagai manfa’ah, dan reward sebagai ujrah. Kegiatan mining itu sendiri merupakan kegiatan bermuamalah yang sebagian besar dilakukan secara digital lewat media internet. Pun begitu, masih terdapat kerancuan pada bagian ketentuan pembayaran ujrah. Antara lain ketentuan ‘harus bersifat tunai’ yang terdapat pada DSN MUI NO:28/DSN-MUI/III/2002 tentang jual beli mata uang, (yang dalam hal ini berkonteks kepada medium pembayaran ujrah). Lebih lanjut tentang hal ini membutuhkan ijtihad dari ulama, khususnya DSN MUI.

Tujuan dari penelitian ini adalah untuk mengukur dan menganalisis seberapa besar pengaruh pelayanan Islami terhadap kepuasan konsumen di 212 Mart Purwakarta. Sampel penelitian ini yaitu konsumen 212 Mart Purwakarta sebanyak 92 orang. Rumus penentuan sampel menggunakan rumus Slovin. Pengumpulan data dilakukan dengan cara menyebarkan kuesioner yang menggunakan skala Likert kepada responden sebanyak 92 orang. Metode yang digunakan adalah metode kuantitatif, yaitu metode yang menggunakan angka-angka kemudian dianalisis menggunakan program SPSS versi 25. Teknik analisa data yang digunakan dalam penelitian ini adalah uji validitas, uji realibilitas, uji asumsi klasik meliputi uji normalitas dan uji linearitas, sedangkan uji hipotesis meliputi uji parsial (t), analisis koefisien determinasi (r2) serta analisis regresi sederhana. Hasil penelitian menunjukkan bahwa variabel independen (Pelayanan Islami) terbukti secara positif dan signifikan berpengaruh terhadap variabel dependen (Kepuasan Konsumen) sebesar 57,7% dengan nilai signifikansi 0,000 < 0,05 dan koefisien regresi X sebesar 0,281 yang artinya bahwa setiap penambahan 1% nilai pelayanan Islami, maka nilai kepuasan konsumen bertambah sebesar 0,281. sedangkan sisanya sebesar 42,3% oleh variabel lain diluar variabel yang digunakan dalam penelitian ini.

The purpose of this research are to know the price strategies of competitive advantaes that is adopted at the Sekolah Alam Purwakarta and how Sekolah Alam Purwakarta presents products differentiation in provding education that is conceptualized according to student needs. The approach of this research uses a qualitative approach. Which is a descriptive study and tends to use analysis with an inductive approach. The competitive advantage strategies applied for educational institutions through the Sekolah Alam Purwakarta pricing strategy involves various parties from Yasasan, Schools, and Parents, and has a pricing policy that is in accordance with government policy, a pricing channel that involves committees as parents' representatives , a clear factor so that price changes can be accounted for, as well as obstacles that have a solution. The second adventage are presenting product differentiation in the form of typical programs. That are morning activity, outbond, home visit, bussines day, fun advanture (camping/ tracking), farming, cooking spesial events, experiments, aquaplays, educational visits, lunches, midday prayers, suttle using companion teacher, trash bank, interships, and backpackers.

Islamic Microeconomics is a branch of economics that examines how individuals conduct economic transactions within the framework of the Qur'an and Sunnah. Imam Abu Ubaid explored this microeconomic problem in his book al-Amwal, while Imam al-Syaibani discussed it in his book al-Alkasb. This magazine examines these two major figures' perspectives on research at the microeconomic level, employing descriptive qualitative approaches, and examining sources from reference journals and books on related themes. Imam Abu Ubaid is a Muslim scholar who is well-versed in the subject. Economic Islam. Many of his ideas were expressed in his many works, the most important of which is Kitab al-Amwal. This book contains Islamic economic principles as a reference in discussions of public finance, whereas Iman As Syaibani in Kitab al Kasb draws a temporary conclusion that work is human productivity that can make a person feel kissed in the world and worthy of worship in achieving Allah SWT's pleasure.

The background of the research conducted at BMT Purwakarta Amanah Sejahtera, where the Amanah Savings decreased every year. This is contradictory to the situation of the Purwakarta people, where the majority of the population is Muslim. Is a potential place for the growth of sharia-based economic activities. To determine the effect of Product Quality on customer decisions to choose Amanah Savings, To determine the effect of Promotion on customer decisions to choose Amanah Savings, To determine Product Quality and Promotions on customer decisions to choose Amanah Savings. The theory presented by the author in the theoretical basis is the theory of Philip Kotler and Fandy Tjiptono for marketing theory, product quality, promotion and customer decisions. The research method used is a quantitative method, a method that uses numbers in each result and is tested using the SPSS application. The population in this study were 52 people. The data analysis techniques used in this study were data validity, data reliability, for the classical assumption test using normality test, multicollinearity test, heteroscedastic test, while hypothesis testing used determination test, partial test (t test), multiple linear regression, and simultaneous test. (f test). The results showed that the variable product quality had no effect on customer decisions of amanah savings at BMT PAS with a tcount of -0.309, smaller than the t table of 2,000. promotion partially (t test) has no effect on customer decisions with t count of 1.753 smaller than t table of 2,000. based on the simultaneous test (f test). Product quality and promotion have no effect on customer decisions with a siginification value of 0.194 greater than 0.05. The conclusion is that the overall hypothesis H0 is accepted and Ha is rejected.