I think by now every bounty hunters should have in mind that reward might not get to them at the end of a campaign and for this reason we should be selective in whatever campaign we want to do. We should not take part in all campaign, this will safe us from some embarrassment that might likely come. Escrow is fine but this might not work with all campaign.
I agree with what you said, because if we are not selective in choosing a bounty project to avoid a scam project, now I think a project that makes payments every week will certainly be better like a project that pays bounty participants using bitcoin, however In this case it seems that the use of escrow is a pretty good step to be able to guarantee bounty participants get paid for their work, but of course escrow is truly trusted.