Sounds really fishy to me.

Any decent deal site generates a lot of buzz, there is virtually no discussion on here,fatwallet, or slick deals.

The whois for yuupon:
http://www.ip-adress.com/whois/yuupon.com

The email address and address link back to Propel Media, a SEO "company"

http://www.propelmedia.com/

On the plus side there is only one complaint, but that could mean very little given that even the big companies living social and groupon generate tons of complaints.

If it sounds too good to be true it probably is...

The "cheapest" travel sites that are legitimate quickly become extremely popular, it's not like travel is some small niche market.