http://notbob.i2p/cgi-bin/blog.cgi?page=443
Anonymous - Sun Nov 5 08:01:45 2023 Alright, let's first begin with the "plus" part. Back in early 2010s, Russian anons (mostly users of 2ch.hk, known as sosach) have uncovered the evidence of having paid shills on their politics-related boards. Apparently, said shills were paid 15 rubles per post, so it became commonplace to respond with "+15" when someone posts something pro-government.