The following paper presents a case study conducted for a non profit organisation (BSU). BSU is a student organisation from Fribourg, Switzerland that regularly organises stock market simulations for students. The purpose of this case study was to analyse participants using a hierarchal fuzzy classification. After a brief overview of BSU, different methods for analysing online customers are analysed. Fuzzy set are presented next and finally a hierarchical fuzzy classification of online participants is presented.