This is really just complaining that you got things for free temporarily that you're not entitled to, which you were told could change, but believe they are entitlements because you got [i]used[/i] to them.
By the logic of this argument, really anyone could sue any company that gives them anything temporarily and win. If you were successful it would make it a much more hostile environment for any game or service to produce anything and forces them to never adapt and never provide anything temporarily out of fear of a small minority of people getting upset. It would set a very bleak precedence for the future of gaming, worse than losing a few features of 1 game.