Maybe they added this recently, my meet-up has been on hiatus and just started up again. This definitely wasn't a thing up until a year or so ago, though.

I've been running meetups for 15 years and it's been a feature as long as I can remember.

Seems like shit UI is a possible culprit here.

Unsurprising.

Edit: or maybe they were in the middle of rolling out the feature and the string of buyouts started...