I just called MR and convinced them to give me the 15k for 10 nights instead of the crappy 10k for 7 night promo. I couldn't get any more out of them but was pleased they gave me what they did, especially as I have already stayed 15 nights with them.

I do not understand their rationale behind the different offers, that they need to make it more difficult for gold and plat members to earn the promo and therefore require additional nights for more points. Shouldn't it just be 10 nights for 15k and 15 nights for 20k or something like that?