Make the same tiers for adding balance on all servers

It’s bad enough that the same products are more expensive on European servers then on American ones, but what is with adding balance difference? So on American server you can add $5, $10 etc, but on European server the least amount of money to add is 10 Euros? Why can’t we add 5 Euros to our balance?

Come to think about it, why are we not allowed to add ANY amount that is over 1 Euro? It is MY balance, I should be able to add 3, 5 ot 8 Euros if I want.

I mean, I know why, but that’s just messed up policy towards the users that pay your salaries. Greed over customer care, I guess.