I always use
Fourth Duration Website quality
If the site is poorly made, many bugs in the interface, poor graphics, then either it is made for illusion, or team has not normal programmers. Both options, of course, are not a good sign.
This is very helpful i also always check the quality of their website before entering their Bounty Campaign.
I also do this. If I am not really attracted to the thread of the bounty I hit the back button and look for other bounties that attract me most.
Thanks for this information though. I will look better so I won't bump into scam bounties and my efforts won't be useless but be properly paid instead.