Obviously, because you go to a point where you get zero cash. Also, the UD just buys fiends and keeps them alive to save up for other things. By tier 2, the guy would have like 700 gold, even with some fiends coming out. Ghouls alone are easy to replace, and they are sure as hell lethal with Frenzy and upgrades. Want an example, some of the replays me and Pan posted prove it lol.