Likewise, if you see trade signals that promises certainty, or bounties that promises you a fixed price for your token, be wary. It is not that easy nor realistic.
I think it does depend though. In the whole world it is not easy to make money anywhere. Also, it is part of the business if an airdrop or a bounty promises you certain token or reward in respect for work-done. It is up to you to decide if you buy the idea and would like to join in the project. We have seen projects ending up paying the promised worths, while some don't make the cut. This is why it is mandatory that you always do your own research.