Yeah, but the problem with this ISP was that they couldn't handle the DoS attacks, or probably security in general, combined with an awful record in customer service which will have led to a decreasing customer base.

So basically, they just didn't have the resources and skill to manage an ISP properly. It's not as if they're the only people in the world the script kiddies have had a go at, as it?

This DoS thing is just a cover story - they don't want to admit how crap they were