These services could all still be provided for "free" and still follow open standards. Just like email is an open standard yet we all still use "free" Gmail.
The success of Facebook is that they offered these services in a very user friendly manner and for "free". The tragedy of Facebook is that their implementations are a proprietary walled garden, and now pretty much a monopoly.
Gmail, and other big email providers, are exactly what we don't want these open/free social media protocols to become. Gmail reads your emails regurgitates them as AdSense.
Personally, I think we need to be encouraging people to pay small fees for services. A dollar a month to use Twitter? Sure! $20 a year to use Gmail minus the data mining? No problem.
The success of Facebook is that they offered these services in a very user friendly manner and for "free". The tragedy of Facebook is that their implementations are a proprietary walled garden, and now pretty much a monopoly.