Can I store few petabytes, and pay for it for one day every 90 days to reset the timer?

What surprised me about GCP was that yes, you could load all of your training data and model weights (terabytes) into a free starter account, then create a new account after 30 days and transfer the billing obligation from account A to account B.

It was such a blessing for hobbyists, back in ye olde 2019.

Presumably you'd have to back pay the 90 days but it's your life

Given that the cloud providers just put a 0 or two on the cost to determine their prices then yes, you could try.

They'll ban you after a year because it will be against their TOS.

But sure, go for it.