Every website on the open web is a walled garden. Attacking Facebook for doing something every other website does is an attack on the open web.
Your argument is tantamount to saying the US isn't a free country because you have to take your shoes off when you visit your friend's house. And then saying your friend should be required to pay you for taking your shoes off.
Your argument is tantamount to saying the US isn't a free country because you have to take your shoes off when you visit your friend's house. And then saying your friend should be required to pay you for taking your shoes off.