I am not familiar with any exit scam that was done based on issuing crypto-powered company shares, which is the topic of discussion. None of the ones you mentioned seem to fall into that category. Most are MLM type stuff.
Where you got the idea that I'm denying the existence of ICO scams, I'll never know.
https://techcrunch.com/2018/04/13/exit-scammers-run-off-with...
https://techcrunch.com/2018/04/18/another-day-another-50-mil...
https://cointelegraph.com/news/unpacking-the-5-biggest-crypt...
Do you need more?