There are SCAMs and there are ELABORATE SCAMs, if it's a well thought out one, I dunno how you can blame anyone, but all BMs should do reverse search, talk to the team over vid conferences, etc.
Also, try coaxing the team to use escrows for bounties, in case of tokens; the BMs can pre-designate a Smart-Contract address that sends the ratio of tokens to it everytime tokens are minted or mined.
My 2c, but most BMs; don't want to get involved in complexities as there are other cheapsters, who do things without a care, but then if Atriz can handle projects such as
Chrysos that appear to be blatant SCAMs, I dunno who to trust.
Personally, I do my own due diligence before joining, watch vids of team and reverse search them.