the AUP pretty much gives them the right to cancel your account at any time for any reason. http://www.hostdepartment.com/aup.html Host Department LLC will be the sole arbiter as to what constitutes a violation of this provision.
what if your site has like loads of stuff up for download(not warez or anything illegal) and the bandwidth consumed per month is around 87gb?
the Abuse of Disk Usage section states: the Abuse of Traffic section states: I would expect that you would get a abuse notice from them if your plans are for file serving.
Stay away from anything saying unlimited. What does unlimited space mean? It's nonsense,same goes for unlimited BW