For fascism, it's not always about getting something you think is a lot. It's about a power relationship. Trump has demonstrated that Nvidia will bow to his will.

It's also potentially an implementation of the foot-in-the-door technique (https://www.simplypsychology.org/compliance.html). It's a common manipulative strategy where you get someone to do a small favor for you which makes them much more likely to do a large favor for you later.