Why not ? If you have small transactions you end up not paying a lot, and the more you make money the more you pay Stripe. If you make so much money that you ca

Why not ? If you have small transactions you end up not paying a lot, and the more you make money the more you pay Stripe. If you make so much money that you can have your own tax system, good for you ! Implement it and don't pay Stripe :) Fixed price schemes would be less fair for small businesses that want to grow. Stripe helps you to grow, so that your company becomes the one big enough to "subsidize" the small ones after benefiting this pricing in the first stage