Sam was not doing what EAism says you should do.
But he was embedded in the EA movement, close to many of its other members, and abetted by people like Will.
So if you look at EA descriptively, Sam was very much doing EA.
He was lying about his business. But he wasn't lying about giving the money away. That was very real, and a big part of what "doing effective altruism" is.
Sam/Caroline were also doing crypto.
The two movements -- EA and crypto -- clearly want to excommunicate them. But both those movements were happy to work with them when they appeared to be successful, non-fraudulent billionaires.
Nobody knows you when you're down and out.