Hey there,
From similar questions that have been answered in the past, the idea is that big games provide a poor experience for users. Even if you have a strong computer that can handle and upload such games, you can easily have a big number of users with low-end systems, which will take a lot of time to load the game.
So even if there was a way to have a paid account and be allowed to upload bigger games, it wouldn’t solve the issue.
Having said that, it’s possible to contact support and ask them to increase the size limit of a project, but it’s mostly for games that are expected to do well.
Hope that helps!