The problem you mentioned OP was really a problem if there were just few merit sources. With over 100 merit sources, you can be sure that at least some of them will like your posts if they are really helpful. And, do not forget that not only the merit sources, even normal members here get merits to spend based on the merits they receive. So your focus should be on making useful posts here instead of complaining about things that you cannot control. Good luck.