It’s been discussed repeatedly right here on HN. Unlike you, it strikes me as one of the dumbest things I’ve heard in a while, and I can support that assessment from multiple angles. But one person’s dumb idea is another’s successful business model, and I’ve been wrong plenty of times in the past. Like a sibling commentor, though, I catch you doing it and your domain will never again resolve to a valid IP on any machine that I own.