I'm willing to bet that for smaller companies, they just won't care enough to consider this an issue and that's what Slack/Salesforce is hedging on.

I can't see a universe in which large corpos would allow such blatant corporate espionage for a product they pay for no less. But I can already imagine trying to talk my CTO (who is deep into the AI sycophancy) into opting us out is gonna be arduous at best.