clipped from en.wikipedia.org

As with all other Trappist breweries, the beer is only sold in order to financially support the monastery and other philanthropic causes. Whilst the brewery is a business by definition (its purpose is to make money), it does not exist for pure profit motives, and they do no advertising except for a small sign outside the abbey which indicates the daily availability of each beer. The monks have repeatedly stated that they only brew enough beer to run the monastery, and will make no more than they need to sell, regardless of demand. During World War II, the brewery stopped supplying wholesalers and since then they only sell to individual buyers in person at the brewery or the visitor's centre opposite. These methods all go against modern business methods, however as stated by the Father Abbott on the opening of the new brewery, "We are no brewers. We are monks. We brew beer to be able to afford being monks.". ^[2]