>>amanap+E9
It wasn't private before, it was made private in protest. I think they are just automatically messaging mods of subreddits that were public before the protests and are now private.
My overall take on this is people have a weird relationship with reddit.
>>cortes+ga
I have an old sub-reddit I haven't used in years back from when they allowed you to use a CNAME to point a sub-reddit and get a custom "front-page" where I would share links I found interesting.
I got the same modmail message, even though I barely have 20 subscribers to that sub-reddit and it has been private since they dropped CNAME for a sub-reddit support.