Beste people

Iam new here and want to ask somehting about rake. For instance pokerstars takes 4,5 % with a max of 1,50 in NL10 games.
So if the pot reach the max of rake and where left with 2 players in the pot we both raked $ 0,75 ? or do i have to win the pot ?

Same for rakeback deals, how can i figure out how much rake i spend each pot.

I just want to make sure, before i go for a rakeback deal. but feeling this is a dumb question but having a hard time figuring it out.

any help would be appriciated..