Bob pretty much answered already but take this as an example:
You have 1 million credits.
With EB level 1 you gain 10%, that’d be 100.000
With EB level 10 you gain 1%, that’d be 10.000.
But with EB 1 you can earn max 175.000 credits per day, and with EB 10 you can earn 4 million per day.
So there’s actually a lot of math related when talking about the EB.
Math which has already been done so you don’t have to do it again