They can't (or don't want to) iterate every possible premium domain in advance, so they run the algorithm on domains that get added to the cart. You're lucky y

They can't (or don't want to) iterate every possible premium domain in advance, so they run the algorithm on domains that get added to the cart. You're lucky you didn't register it at the regular price and start to build a brand for yourself that you find out a year later is considered premium. So the domain is then held hostage for that $3000.