The boardroom will absolutely veto a decision like "let's give all of our proprietary data way to a company that will use it to train a competing product". That's why zero data retention exists, and why it's corporate suicide to not do it correctly.
If the news broke tomorrow that their internal, Navier-Stokes-defeating models had actually used those private tokens, I'm sure we'd all act surprised and outraged – it'd be an egregious violation of their agreements. But would it actually be that surprising given their recent history?