Andersp: Oh im sorry i misunderstood...so you accept a friendly invitation for backgammon?

Lol. Yes, you have misunderstood and I dare say you know it, too.

It's very clear what my position is. It's completely certain that I will reject (by ignoring) a rude invitation (defined specifically as one with no text whatsoever). And it's very unlikely, in the case of Backgammon, that I will accept even friendly invitations. "Very unlikely" is, of course, not measured as 0%. This therefore means that some percentage of friendly invitations would be accepted.

think you should add that to your profile

It's all there in one short sentence. All you have to do is not misunderstand it!