there are many web hosts that launch promotional pricing over domain registration for their customers. globat is one of them.
Truthfully for domain registration with Globat you get better deals if you host with them and have multi-year packages. I use a multi-year hosting plan with them and the domain registration and annual renewals are free. If you are looking just to have them create domain and not host with them, you are probably better off going elsewhere. Just my 2¢