Points for posting and prefix's

Hi, I'm wondering if it's possible to add a prefix (solved, unsolved etc.) and/or points for posting.

I want to make it so you get points for posting and you can donate for points too, and with the points you can buy stuff from the points shop idea.

Yes there is a points system i modules i think

Yeah, but how do I make them decrease when they buy an item

I don't understand.

You spend points on a custom shop, so some of them disapear. You know when you buy something from a shop in real life? you give them the money?

I believe that you have to take away the points yourself.

Danno