Sweepstakes are defined and usually pretty tightly regulated on the state level, in part because they can quickly become gambling. That's why there always a "NO PURCHASE NECESSSARY" and usually the option to mail-in for an entry. Companies don't get to redefine what a sweepstakes is.
It's surprising they would risk the "make it up the rules as we go along" approach, because the main point of the official rules is to keep things legal. One of those legal requirements is usually to disclose how the winners are chosen.
I'm no lawyer, but I would think you could argue that if they don't disclose how to enter, then they haven't disclosed how to win. You could also argue that if the winners are "nominated" or otherwise selected by social media influence then the winners are not random. This would not be a legal sweepstakes in a lot more states than NY or FL (VA for example).
The official rules say the winners will be random, that there are only 175 prizes, and that exactly one of those prizes will be an RTX 4060 Ti (just under $70k total value). But they do say they might add more prizes later.
I'm scratching my head about what exactly they are trying to say with contradictory claims like:
"This year, we’re taking things to an absurd new level with the biggest prize pool GeForce has ever seen: a whopping $150,000 worth of prizes. Prizes include 460 (four-hundred and sixty) GeForce RTX 4060 Ti and 4060 graphics cards, plus G-SYNC displays, a one-of-a-kind PC rig, custom backplates, RTX On keycaps, and more! "
(keycaps not mentioned in official prizes) and then
"To celebrate our launch, we’re asking our community to nominate 100 creators for a GeForce RTX 4060 Ti upgrade, plus two GeForce RTX 4060 cards to give away to their community! "
To me it that last line sounds like social media is going to somehow pick their top 100 mega influencers (presumably from the pool of Nvidia marketing affiliates) who will each receive 3 cards. That's not a sweepstakes.
This is a mess. I just emailed their generic customer service system to see if there is any official way for us non-influencer pleebs to enter.