I had to think back, and I think our first customer was a donated space. Then a year ago (this same month) he decided to convert to a paid account, without any prompting on our part.

Our second and third clients, (if memory serves correctly) were both sites that went out of business.

The next two we still have... One of those sites I worry a bit about, it's been broken (script problem I assume) for well over a year, the owner has been out of touch for quite a bit longer, but keeps making his monthly automated PayPal payment.