The capitalist economy is based on the explicit idea that everyone will do everything they can to extract value from everyone else, and it'll come to some kind of equilibrium. If you do not do this but you allow everyone else to do this, you receive worse quality products for ridiculous prices and do nothing about it.

In other words, you owe me $1000 as a condition of reading this comment. Your options are to unread the comment, pay me $1000, or pay me nothing to incentivize me to charge a price you'll actually pay (likely $0.00 for comments but not for everything)