Re: Is tradehill.com really hosted on a shared hosting account?
I'm pretty sure it's Hostgator or at least something similar. Their site can obviously handle no more traffic than Susie's Geocities page about beanie babies.
Don't even say that name. They are so bad just so bad. 
There are actually worst hosts like bluehost. Chances are if they list UNLIMITED bandwidth, disk space, etc they are retardedly overcrowded and will disable your site once it gets hit by more then a small breeze.