This situation is prevalent in the crypto community. Project developers often seek for Cheap marketing services through bounty hunters but after these tasks they subtly scam them. I think the best way to handle these issues is to avoid bounties conducted by these cheats and join only bounties from reputable managers, that is the only way to save yourself of the stress and time
Yes, Desico bounty was one of the most demanding bounties..
I am more and more disappointed by the crypto-community, there was many scams where scammers did not suffer the consequences... And community just forgot about these case sooner or later...
And about Desico as investment - my friend told me it looks very worryingly so I think anyone willing to invest in Desico, in any way, should keep the extreme caution!