Technically, what they “own” and provide is a system of network connections because we failed to build technology that allows us to make those connections without them. And they have exploited that simple fact to the most insane and abusive degree possible. So while you’re right in a sense, i think it’s more precise not to say they don’t provide anything at all, but that they have created a giant closed environment so they can rent seek off of everyone who joins it to find other people (rather than something they provide directly). They’ve tried to “own” the market square and the very idea of others’ communication.