Using Copytrack, tineye, reverse google image search, or doing vanity searches on Google, my stock images turn up on lots of strange sites.

Some sites do the right thing and acknowledge author and agency, but the majority are used with image only. But if they have paid their $0.10 or $10 or more, who am I to complain

It is very unlikely you will become rich loading to the normal stock sites

Adobe stock, shutter stock, wirestock, and istock/getty all provide regular income. New Zealand's own "mychillybin" used to be excellent. Dreamstime and Eyeem are not recommended