Very confusing thread for several reasons.

I have participated in massive conventions at Marriotts on several occasions. I am also in the process of planning a comparatively small-scale event (i.e., I have the role as the meeting planner).

The notion of a 22% commission for the planner is something I've never heard of. I'm not buying it unless someone can provide more details. I can't even imagine a travel agent taking that much vigorish!

The people who stay at the Marriott under the master agreements don't earn points for those stays. That's pretty cut-and-dry. If the room cost isn't on your folio (and on your credit card), you aren't going to earn the points. That's common practice, and well-published in the rules.

Meeting planners DO earn points. But there are caps at reasonable levels. (50K plus bonuses, according the the "normal" rules.) I find it highly unlikely that Marriott gave one person 1.8 million points for planning an event. Hotel managers certainly do woo regular event planners with free rooms, dinners, etc. - but a couple million hotel points is probably a bit excessive.

In conclusion, I don't think anyone "stole" your points. If the meeting planner wasn't 100% candid with her boss about the perks and points she earned, that's a separate topic.