Yea, totally the same deal with me. I have local photographer friends who were always sending me links of people using my photos without permission and I chased them for a while and then just gave up because it was a never-ending problem and I had better things to do with my time.
I submitted a load of cases to Pixsy about six months ago because they kept emailing me and I thought, fuck it, I'll put a few in. I submitted about 20 I think on that original batch and I kept getting rejection after rejection. In fact I even deleted my account and then the next day they emailed and said 'congrats you've got a pay-out, here's $700USD'. So I had to get them to undelete my account so I could put my bank details in for the transfer.
Lots of very predictable choices here - the usual names. I don't mind them but I've found myself watching more and more channels with small or medium subscriber bases. Something a bit more real about their content. Here's a few I've found over the last six months or so.
Kieran Hayes
Alex Kim
Harmen Hoek
William Patino
Kim Grant
Andy Hutchinson
Gary Gough
Chris Orange
Simon Booth
Tin House Studios
Mads Peter Iversen