I've had live video chat with projects that turned out to be a scam in the end. What's your point?
The thing is, many projects start legit, and once they see that it's not going well, they take what's left and run away, basically scamming even their own team members...
This answers your request OP and I think this should be valid since btcltcdigger is one the veteran bounty manager you can find in this community. I have joined some of his bounties last 2018 and some of them didn't turn well as expected. As you can see, they also doing their best to promote the best bounty out there but scammers always find a way to fool these guys, I think every bounty manager in this community has encountered this kind of problem and learned from those experiences.