No one does. How/why would people know "Who scammers are"... they would be banned if they are a known scammer with evidence against them? Also where is your source for those 2 statements?
Well it’s clear 100m isn’t a serious offer.
The reason it’ll sell is with serious buyers I’m willing to exchange real information that they can verify. The person who offered 2.5B 07 has agreed and is fine with that.