Tesla
Websites like Adobe, a few bodybuilding forums, a game forums allow you to upload directly, i don't know of any other modeler website as this is the only one i go to.
But when i started the web back in the day using URL's for images was the norm but now its rare that I personally see.
I can guarantee you that linking as opposed to uploading isn't rare. It a little unusual that FSM doesn't have upload features, compared with other forums, but as we've discussed earlier in the thread, there are good reasons not to allow file uploads.
As far as other forums go, I use the following:
Hyperscale's Plane Talking and Ship forums: (no uploads, as far as I can tell)
Treefrog Treasures Toy Soldier forum (uploads allowed, but with file size limits)
HZ-Forum (a German figure painter's forum) (uploads allowed, but with file size limits)
Planet Figure (uploads, size limits)
Timelines-Historica (uploads, size limits)
e0264 (anime and other figures) (uploads, size limits)
Clubhouse (uploads, size limits)
Maschinenkrueger (no uploads, because the webmaster doesn't want to deal with file size issues)
I'm sure everyone else can come up with a similar list from his own experience. As I said in my earlier post, I prefer using a hosting site and linking, rather than dealing with different file size limits across all of the forums I participate in. Linking works everywhere, with little additional fuss required of me.