I have been a customer of NemoHosting for a few months now and I've found the customer service to be great, as well as the hosting. I believe in the mom and pop organizations, versus the corporate giants. They have been extremely helpful in answering my questions and talk to me like a real person rather than a call center robot reading off a form. I believe that they are dedicated to their customers and their happiness. Maybe I'll bite my tongue later, but I seriously doubt they are going anywhere anytime soon.
It seems that most providers, professional or otherwise, tend to get nervous when you reach a certain threshold. They either delete you or they charge you some large overage fees. If NemoHosting is not doing that practice, and I haven't seen any evidence in this thread that they are, then I don't see what the problem is. To me, it seems very impractical and not very cost effective to maintain bandwidth to cover every client, when it's statistically impossible that each would use their complete bandwidth that they pay for. For instance, if a webhost has 300 customers at 60gig a month, than in order not to oversell by your definition, the webhost would have to maintain 18,000gig, which would be very, very expensive and the customer winds up getting the "savings" in their bill each month. If that 300 users were only using 1000gig at best, than having 17,000gig on hand seems like a horrific waste to me. As long as the webhost maintains a significantly higher bandwidth level than is being used, I don't see the issue.
The Manor uses 9 gig a month on average thus far. When I was shopping around to move it (from phpwebhosting which was extremely restrictive on what could or could not be done), I didn't know how much the new design and features would take. I was scared to commit to a webhost that said 10gig and then charged $5 a gig after that if I went over. I had a vision of it taking about 100gig. I was obviously way wrong, but I picked NemoHosting because of several happy customers and the fact that I could dive in and see where I was without losing my shirt. Now it's nice to know that I have a degree of elbow room to try new things and I am fully aware that if the bandwidth starts getting far more intense, that I will probably have to move it to a dedicated server, but until then, I am happy where I am.