antitrust? Is twitter a monopoly now?
When I go to X department store, they'll happily look up how items are priced on their website for price matching, but they won't look at the website for Y department store to whom they would also price match. Is that anti-competitive?
That's a long way around to what level do businesses have to help you in sending you to a competitor?
Antitrust laws is not about waiting for a monopoly to establish itself and then deconstructing it, but about preventing one.