Reliable enough.
Recently I participated in the bounty of the company DROPIL on the platform Bountihive.io.
Took part in the bounty of social networks (Facebook + Twitter). Very simple terms of participation. The company lasted 4 weeks, received about 20,000 DROP - 120 dollars
as for me the platform has its minuses and pluses:
+ I do not need reports
- You can not control the number of your stacks.
- Until the end of the bounty you do not know if you are doing everything rightfully or not.
- A very large number of participants