Gambling sites are the majority today, in the past it might have been mixers. There have also been a good amount of campaigns for instant exchanges. The thing they all have in common is that they are in a legal gray area and they are restricted from advertising on mainstream platforms.

I’ve also wondered why there aren’t other kinds of products advertised. I would think that Trezor and Coldcard have the budget to run a signature campaign if they wanted and they would be reaching their target audience.

Even if the forum loses popularity, it is still great for SEO purposes because of the notoriety of being the forum that Satoshi and many other notable people were members of. As long as the website is kept running you can always count on there being traffic directed to the forum.