[quickthrower2]

The problem is the expectation that these services are gratis to users. If users are prepared to pay, this metal community for example would be on its own domain with a PHPBB or similar. Many people do this by the way. Even for non technical topics.

People pay a lot for internet access both through mobile and land connections but are less willing to pay for things on the internet or maybe its the hassle of setting up a site (comparable to the hassle of say buying a car: a hassle but not insurmountable for anyone).