My Sent merit:
March >
107 Feb >
51Jan>
106Dec>
47is my userID invisible in whatever data you use to conduct these results ?

, i read the op trying to find any special criteria which i don't fit into,i couldn't find any reason why am i not being listed in the most generous merit senders despite the fact that I sent hundreds of them so far

This metric takes the amount of sent merits and subtracts 1/2 the number of received merits.(since you get 1 smerit for every 2 merits received.) The "generosity" is indicating that you are giving more than you are receiving.