Comment by solenoid0937

I see what you mean - but I am not sure it would work for the "you don't know what you don't know" cases, or cases where the user isn't invested enough to follow the relevant forum.

I personally wasn't interested in miniature titanium puzzles until I saw the ad - I'm not interested in puzzles in general, so I wouldn't have found it via a puzzle forum.

The same pattern can be seen in my other hobbies (tritium collecting, mokume and titanium/zirconium Damascus items, unique independent watches, flashlight collecting, rocks).

I'm involved enough to buy something from an ad while scrolling through my friends' timelines or reels, but certainly not enough to frequent a forum on these topics. So I am not sure forums suffice.