They did not offer me commercial service. When they shut me off, I asked about it specifically, and they said I couldn't have Internet service in my name, period. It's quite possible I had a crappy rep on the phone, but it seemed like a dead end.
I had two options here in Seattle. Clearwire? 4g, with a modem positioned at my window, hoping it got better reception than my phone? Nah.
Or Qwest (now Century Link) DSL. The DSL has been fine. Not quite as fast, or stable (recent storms and flooding forced a lot of reconnects) but is just fine.
Comcast cut me off last year, after 7 years of service. I got a lil "greedy" and broke the 250g cap (300g+) - never even knew there was a bandwidth meter at their site.
By the time they warned me, it was already halfway through the next month. I slowed my usage down, but still broke 260g at the end of the month (I work from home, use it for everything).
They shut me off, banned me from service for 1 year, and absolutely no one at customer service or their "security department" would even talk to me. Zero tolerance, no options.