You would need to contact Mario and inquire. They may offer you a deal. Try contacting him through his own site.
Yes they do, but Mario has nothing to do with it. He is Director of Concept. Nor is Temptation Social his site. It will depend on the size of your group as to what rate they offer, but I doubt it will be very good. I suggest you go through their FB page or website contact to find out who you need to talk to.