The provision of library services through rigid compartmentalisation of academic, public, school, and special libraries operating in one country can be cost-effective if a country has strong socio-economic, cultural, educational, and political structures. This arrangement is apparently a fallacy for countries that lack such structures, as is the case with Lesotho. This study examined the outcomes and the impact of the UNESCO-funded project titled Distance and Rural Learner-Teacher Support through a Mobile Digital Library (DRULETSMODIL) in Lesotho. The National University of Lesotho (NUL) Library proposed DRULETSMODIL whose objective was to reach out to NUL’s de jure distant teachers and learners. Additionally, the project expanded its scope to include library services to rural and poor communities. This paper outlines how use of the descriptive method, called the corporate social responsibility (CSR) principle, utilised the case study approach to interrogate DRULETSMODIL’s performance. The findings reveal that the project embodied various levels of diversity, inclusivity, and (mainly) social responsibility aspects of providing information for free, to the marginalized communities. From DRULETSMODIL’s three phases covering all the ten districts of Lesotho, positive outcomes were recorded. Through Information, Communication, and Technology apparatuses, DRULETSMODIL’s offerings, and the support of Participatory Initiative for Social Accountability (PISA), diverse information was easily and cost-effectively accessible. The project attracted various partners; beneficiaries included academic library users, secondary schools, and male and female youth and adults in the villages. The study recommends advocacy on CSR for all types of businesses and consideration of this model for developing countries.