Pretending to be an "influencer" so you get free press keys
Buying keys in a region with low regional pricing then reselling them in a higher region
Buying a bunch of keys during a sale, then reselling them a couple of months after the game is no longer on sale
Steam has lower prices in some countries. Factorio sells for the equivalent of $12 in India while it sells for $30 elsewhere. Most games are similarly discounted. That said, someone who buys it from Steam can't gift the game (or presumably extract a key) to someone in a different country. If you bought the game in India, only an Indian account can play it.
Notice that companies can do that with labor and buildings and tax evasion, and it's 'situation normal'... But when real humans try to, its bad and illegal and horrible.
Hmm.