[Privavault]

This is exactly why I've become paranoid about what gets stored in cloud services, even ones I generally trust. The policy changes can happen overnight, and suddenly data you uploaded under one set of assumptions is now being used for something completely different.

To reduce this risk, either completely remove truly sensitive documents from cloud services or implement client-side encryption before uploading them anywhere. The key insight is that if the service can read your files to train models, you don't actually have privacy regardless of what the policy says today.

I'm building PrivaVault specifically because I got burned by a similar policy change last year. The approach is zero-knowledge encryption, where we literally can't read user documents even if we wanted to. Launching in 7 days if anyone wants to check it out, but honestly the broader principle applies: encrypt before it leaves your device, or don't be surprised when it ends up training someone's AI.