The rake is 5%, but for the SNGs there are minor and major challenges. When you complete one of them you get challenge points. It is not like HexaPro or MTT, where you get challenge points direct with your buy-in.
Oh, that explains everything I saw the challenges and indeed I received points every time I finished one, but I thought that apart from challenges you get points like mtts. If I think about it now, I realize it would be too much Thank you for your quick reply, i hope you'll have a nice day!