Lets say they don't use private data for training

(Continue reading when you're done laughing):

Eventually, victims eventually run out of "free" storage.

The humble corporation will do a bunch of psychologically unethical tricks to basically hypnotize users into forking over those three digits at the back of the family credit card.

Now the victim's data is effectively held ransom. Keep paying or lose it.

But they won't stop paying. They paid for a year's plan at a discount and the peaceful megacorp conveniently hit autorenew for them at checkout.

12 months roll around and oopsie, they already have the money. They could go through the refund process, but they've got shit on their plate, might as well keep it for another year.

I could keep rambling, but on Lemmy, I'm probably preaching to the choir about the first verse of genesis.