Adding a wallet field under users nickname

[smartmouse]

Hello, i would like to add a "wallet" field under nickname of every user. This field should contain money (account balance) that user can earn doing certain action on my forum.
Do you know any way or mod that do that?

[Oldiesmann]

SMFShop - Shop MOD

That gives them a pre-determined amount of credits for posting and creating new topics, and they can buy stuff with those credits (sticky topics, assorted completely pointless random objects, etc. ). You can also code your own items that they can purchase, and even allow them to earn interest on their points.

[smartmouse]

I have already tried it and it's to complicated for my needs.
I just need a field like karma, where to add or deduct amounts that i (the admin and only him) want.

I hope it exists something similar.

Thank you and sorry for my english.

[smartmouse]

Nothing?