I don't possibly know why an in-ring promo would be against the rules.
Although I don't see a problem with it, I think what was ment by the rule (or what I remember smeone saying someplace) was "In ring" as in during a match, making yoursef in to look better. Hell, it might of been me tha said that in the RP Pet Peeves thread. I don't remember right now.
But the way GM did it, I don't think thats against the rule/suggestion/whatever the hell it was.
I need to take a nap.