Refereum is having pretty nice bounty campaign right now! check it out if u want https://earn.refereum.com/?refid=f5z47ao5l6
it's a payment/donation platform for twitch, very solid whitepaper and great team (former google, ign, lucasarts, ubisoft...)
they have bounties for twitter, facebook, bitcointalk forum, meme creation & watching/hosting streams etc.