So because it would wreck they if others found out, it’s unlikely?

Which is more likely? That past behavior is an indication of future behavior, or that they because they could be eliminated from being found out it’s unlikely they’d do that thing. (By the way it’s also likely they’d are eliminated if they dont train their data with every advantage over their competitors possible). So I think it’s naive to think the incentives reward not doing the malicious thing now.

They're not training on your data, they're training on "please anonymise this conversation" data.