Photobuckets fiasco definitely didn't help any forums. Some posters did bother to re post their pics in the more involved threads they felt were of vallue, but many did not bother, and it got a case of filling in the gaps yourself on some articles. And in fairness i think many were put off by this aspect.
Other factors need considering too, and on some forums unrelated to motorcycling too there were as far back as the late norties early 2010s piss poor near current ADV rider like management / moderation in operation, this devolved the forums to a large extent, and it was only a few stelwarts who kept them running at all.
The Refuge waterfowling forum went south at this time, and a strange management with brutal moderation meant some of the key posters were either hounded out banned or just left. A few on the fringe did sieze the moment and kind of made it their own with a gathering of folowers who more or less just ran around patting the new gurus on the back, and as such felt acepted.
As a sourse of real information it simply ceased to be worthwile, with a mere few putting out scant worthy of merit threads or reply posts.
Other forums worldwide did go similar directions Hunt/ fish In NZ hung on a little but it changed format a few times regulars came and went left for grass greaner new forums, and it simply lost its apeal. retro rides Vissors down and Pigeon decoying uk all had big folowings, but dwindled away or got swamped by heroes who were larger than life knew more did more and were more than anyone else. People just gave up, got disalusioned by much of this venom and went to Social media cto post pictures of the sunday lunch they were about to sit and eat for the whole world to see.
Yp. A few survive and some are sort of usefull to some limited extentb like say duck hunt chat for example, but other similar forums died out, and any left are shadows of what they once were.