how to find that bounties are not a scam actually
Just simple advice from me, To be honest i'm still fall for some failed bounty (Scam, Not reached Softcap, etc) but i suppose it can minimize to be scammed. Just look on their manager first, if that bounty come from reputable member/manager more or less will be an successful bounty, Look on their team background, Is there any Softcap? If so, Try asking if they already reach the softcap and what will they do if not reach the softcap, Last things, Today there is some bounty platform like bounty0x, It can be alternative too. DYOR and careful!
yeah, i would add, ask something on telegram, regarding things that are not so popular, as softcap, hardcap, how much they have collected, how many team members they have in development team, or something similar, and check an answer, if there is any
if they decide to shut you down, block or do not answer, does not have to be a scam, but it is a big red flag, and i skip those