Check out https://osintcurio.us/. It’s a new site authored by several pretty well known names in the industry. How it got started is a mystery (how I got invited is even more of a mystery).
I’m really excited for the site. There are already 11 posts on the site (including my origin post), including one about Python and how to use it for OSINT purposes. As with other communities I’ve contributed to, there’s a lot of excitement to start. Then it dies off. I don’t think this is the case here. There’s a lot of people involved that are really into OSINT. Most of them are regular contributors. I hope I can match their energy for this site.