My question reading the linked article is: how will it be enforced, when millions of people like you have already linked other sites? Is there a time limit before banning (not specified), or will they delete tweets/reset profiles, or will they only check for new changes?

I don't know how much you are attached to your Twitter account, but I'd be curious to see what happens if you don't change your profile. I bet nothing for a long time, unless maybe someone specifically reports you.