I recently subscribed. I noticed the fee for fair registration as well. Did you have any luck with them? 

I just received the email for them. What do you all think?

I just sent them an e-mail asking questions. This does look like a bogus money making scheme for whoever is setting up the job fair.  Charging Job-seekers is just wrong on so many levels.  Plus, in this system, you sign up, pay, submit your resume and then it is still up the the firms to decide if they want to set up an interview.  This is not a job fair.

Sounds like a scam, they probably also ask for a cut of whatever you may make if you get a job through them as well. It's free to cal the principle of a firm, you don't need third-parties to do your job searching.