Affiliate Commission in Reward points

It would be awesome if I could give the affiliate commission in Reward Points.

have you seen anything for this? I would like to do this as well.

You can simply substract the commission from the affiliate account and add as rewards points (at a rate you decide) in his customer account (the affiliate needs to have a customer account, unless you join the 2 types of accounts).
Be aware that most affiliates love money, not reward points :-).