They all allege that the token issuers took advantage of the market’s lack of understanding and awareness of how cryptocurrencies worked. And they sold these alleged illegal securities to US citizens.
From this phrase, do I understand that they allege these companies because some users are unaware of how these tokens work? Or their ignorance or delusion that they are illegal securities? The law does not protect the dupes.
I think that as there are so many scams out there, and those companies like Bitmex, binance, etc know (or at least should know) that some of them are scams, they could be responsible.
It is a lawsuit, they have not been condemned yet.
These kind of lawsuit are more often than most people think in financial markets.
For example, the biggest company in Brazil, a stated owened oil company Petrobras, is under a legal lawsuit because the CEO knew about corruption and did nothing to stop. Investors are demanding money, because companies stocks crashed and the CEO lied about corruption. The investors said that if the CEO said there was corruption, they wouldn't have bought... something like that.