Is 100GB and 10GB of webspace good to hosting a successful forum hosted by SMF? When I mean successful I mean active users, lots of content, and well a forum like this: http://www.cheapassgamer.com/forums/
Not even close. I suspect CAG is running off multiple servers and goes through over 1TB of BW a month.
My forum (5000 posts a month) uses 5GB BW and 250MB of space (I also run e107 and another SMF though).