I've come across with the Scam projects of course. For bounty hunter the first signal of fraud can serve as a closing spreadsheet and the lack of specificity in the reports of the moderator.
With me if that project scam. surely they will never distribute bonuses. Or distribution delay, Obviously they do not want to pay bounty hunters. I have met many such projects in the past 2 years
What you say is really a sign of the fraud of projects but worse and more sophisticated, many phishing projects still pay full tokens and bonus distribution, the hunters still get rewards through bounty but the most obnoxious issue that people always face is the promise of projects, they always promise to list and have new plans but once after that many times. Since then, the project has died over time, this is something I recognize from scam projects, they never have a fix on listing, they just talk for fun instead of doing it.