Definitely one of the most popular bounty Management as of now, they have pretty good list of bounties at are actually doing well or have been running before coming out to be blockchain integrated. HEX has been doing well when it come to price value, Earnbet just ended and distribute the rewards in XRP supposed to be (WAX) but the team opted to distribute XRP instead. The number of members have exploded from 85k from last time I saw, now goes up 100k.

Some other Good Projects they handle:

ARCS- Already listed in Kucoin
IOI Games- TRX payment
Ludena Protocol- Eth Payment