[abetusk]

In my opinion, a big part of the success of Wikipedia is that it offers its content under a libre/free license (CC-BY-SA). This specifically allows for commercial re-use and re-sale.

The license provides a wide umbrella so that many different people and entities can use the content without worry. Contributions provide a fly-wheel of improvement.

A lot of the current batch of internet companies provide walled gardens and eventually succumb to the trappings of monopolies. In some sense, I think it's survivorship bias. The only entities that stand the test of time are the ones that provide content under libre/free licensing.

While I don't disagree with your list, I think a missing component is access to the commons. Without a rich commons, our society suffers as content sinks into a copyright quagmire.