Try to google those partners, the only one with a legit site was comtrade ( http://www.comtrade.com/ )

look at the other partners their sites:

E-frag: http://www.e-frag.net

zmajska pivovara: http://www.zmajskapivovara.hr/

I can't even find a site for comunie di pirano and play ground.

Im just curious how those sponsers can get 150.000$. (not including the price of the event itself)

Also, the rent for those rooms ; it says the archmage suite costs 590€ (it says it costs 501.50€ on the site but this might be an mistake) But when i tried booking at the riviera hotel in Portoroz it costed 805.50€. I can understand they can get some discount, but 300€ is a huge difference. i used booking.com for this( long link )

But once again, i might just be wrong here but i think all of this looks kinda shady.