I was going to the monthly IoT meetup up to about 2 years ago. The current maintainer was moving across the US, and wanted to transfer the group (nonprofit) to me. Seemed simple enough.
We go through the steps and then I get hit with the gotcha: pay $15 a month! Uhhh, $15 a month for what amounts to a email list and a webpage? I don't think so. Perhaps I could export the list and use my own platform? Nope! But they do offer great suggestions, like charge dues.
In the end, I "let" the group die.