For those of us quibbling about price structures, Robert Garriott helpfully supplies us with the answer to what a game with Guild Wars’ billing model needs to do to be successful.

“We have to sell at least five times more copies than a subscriber-based online game in order to get to about the same level of profitability,” says Garriott, matter of factly.

At least. Noted: the article doesn’t mention whether or not they succeeded, although (as some have noted here) at the very least their sales in America have been very good.