There are too many campaigns but I am sure the trend is just at the beginning of the devastating growth period.
I use some small group channels in the telegram to be notified about new good bounty campaigns, and my payment for that is the % that a person (invitor) get from my participation.
I might go to bountylord website than joining the telegram group with percentage commission from the people who will join the bounty he/she refer.
There are too many ICO on altcoin(bounty) and you can choose there! you just need to check the campaign, their website, and whitepaper.
Campaigns are a good source of free money, but you need to be careful in choosing what kind of bounty you gonna join.