Not necessarily now, but if you decide to turn that little ML project into a startup, staying on the same infrastructure at first, Nvidia might just come after you.

Considering this is HN, it's a pretty safe assumption that people are running these side projects to turn them into startups.

How would they know your startup is doing ML violating their EULAs? I really don't see how this can be a concern for anyone, but very few companies.