Where can I see a list of all merit sources on the forum? Is there such a list at all? I read somewhere that there are 97 or so. 
The best list I've seen is made by Coin-1: [TOP-200] The most generous users giving merits. This list currently shows more than the official number of 97 Merit sources. Unless someone declares it, it can't be detected with certainty when a source gets removed.There may also be false negatives in the list.