Spoke to one of the properties which have been mentioned on this thread with a low rate.
Person needs to sign in to get the reward nights. No shows will get charged but will not be awarded the elite nights.
Is this a new rule or has this always been in placed and properties have been notified about this 'hack'?
The T&C says (or said) that there's no requirement for the event planner to attend. However, that's not the same as someone needs to attend so perhaps a gray area.
If they're charging for a rental, then they should also be entering it in the Event Manager even if it's a no show. The property does not award nights. That's not up to them. If they're refusing to enter the event and dollar amount while still charging and you have a signed contract (or receipt email from the Quick Book tool), then contact MR to have them educate the property.
Or look for another property that won't hassle you for a meeting.