To increase their revenues, non profit organizations tend to develop merchandise catalogs and send them to their donors. A preliminary study shows that some adverse effects could harm either from a qualitative point of view (image) or from a quantitative point of view (amount of money and donation frequency).
DESMET, P. (1996). Intérêt et limites de la vente par catalogue en collecte de fonds. Revue Française du Marketing, pp. 23-32.