It is an ad spamming nightmare. "FREE" is not free in this case. I hope the ads are generating you some sort of revenue. You have a lot of work invested in your models and I understand seeking some sort of compensation for your work but the host you chose leaves a lot to be desired. Up to me I would "trash" all of your listings using modsfire as the remote host for the files. On the other hand the way Valve's user agreement goes I am not sure on the legality of selling your models.
Your models are amazing and I wish I was going on and on about them and not your choice of host.
**Warning to everyone clicking the modsfire links. Make sure your browser is very secure unless you don't mind getting flooded with ads. **