You showed them that this tactic works, and have rewarded them for anti-competitive behavior. I wish I could say you've won in this situation, but at what cost to the rest of us?
Now, I understand that in real life, it's not an easy, abstract choice - you have "only human" issues playing part, like being tired and wanting to get the Internet situation sorted out ASAP. So to be clear - I'm not blaming the poster for choosing this way. But it was a suboptimal decision - and the kind of decision that lets schemes like this exist in the first place, so I wouldn't call it "beating lock-in".