A few years back I had a free subdomain account with netfirms, I worked a lot on my site and promoted it and finally when I started getting traffic on my site than netfirms disabled my account saying that I crossed the 50 MB per day traffic limit and asked me to upgrade to a paid plan, as It was a subdomain so I was stuck with netfirms and all my work on the site was wasted
If you are looking for free hosting than avoid netfirms, go for something like geocities or angelfire, at least they won't disable your account permanently for crossing the bandwidth limit