Discrimination between US and EU players payment

I can understand that u are fore by tax to sell games on different price in different country like in US shadowlands is 39,99$ and for EU is 39,99e
but can u explane me why is minimum to put on balance for EU players 10e and for US players 5$
every game platform like steam, epicgames, etc have different prices for same game in different country, but the minimum to put on balance is same for everyone everywhere. Shame