Why is this project on the list? Have their tokens been traded? Where ? I can't see it on their platform though
OP only listed campaigns or Bounties that He thinks are safe to Join with but this is not necessarily mean that all of the listed project are legit and will pay because there is no perfect project.
An what you are asking is about the trading of their Token in which not in OP's control,What he say is
paying campaign but about listing and other related thing is all for the developer.
So why not add Oikos to the list. Oikos has recently distributed tokens for airdrops and it looks like the bounty tokens will also be distributed smoothly later, and also OIKOS will clearly be traded.