Who is scamming? Is it SUI or someone else.
This scam was made by a unknown source who's identify still not disclosed yet. AZA ventures acted as a 3rd party for rising fund from people and managing all the funds.
This OTC deal was about those Top 10 CMC listed and top tier exchange listed token which was offered almost 40-50% discounts from the current market price. People's we're convinced by saying that these token's are locked and everyone will get these by vesting through several months. Full token unlock period was 3month as I see. People's were jumping without any consent or research. There was some token that we're fully unlocked total supply even though their OTC deals we're available in disguise of vested token.
Even Sui
Co - Founder Adeniyi.sui exposed this scam on his X handle . But still people jumped for this shit.

So what happened next is , OTC deal's were coming one after another . No one was securing their initial and invested more for better return. Eventually this behavior lead to them to execute ponzi scheme. Paying previous user's vested token by getting new commers fund. In reality there was no vested token even from that project.
Some of my friend's and community members did participate on this and they lost all of their life savings. Even some crazy people invested by borrowing money. I hope there won't be any suicide case for this.
they deal in OTC like SUI, Berachain, Aptos,KAVA, IMX etc.
The total supply of Kava was already fully unlocked so their shouldn't be any vested token for a Angel / private sale investor invested on it. It was a clear deception but still people's we're investing.
It was not like OTC deals aren't real totally , some OTC deal exist but this hype and constant flow of money lead them to do this scam.