Sponsorpay typically pays out 98-99% of the time.
Matomy, on a good day, pays out maybe 30% (and you usually have to watch 2-5 videos for that 1 in 3 shot at a token.)
Supersonicads don't seem to have a lot of video opportunities, and when they do, they pay out about 1/2 the time.

So I've blocked all except Sponsorpay. Saves wasted time and frustration.
(Note, I'm only referring to tokens for videos. The "do x for tokens" offers are another story (with even worse payouts in most cases, not to mention all the malware in the downloads.)