Interesting. Google Maps shows a building that looks a bit empty at that address. And last time the google car drove past, it was for lease too. They could have leased it, but why get such a big building around other buildings that are also in a defunct part of town, for the purpose of running a competition? Phishing attempt? I'd be a little concerned about the fact that the Bitfountain company doesn't seem to have anything to do with it. As far as I'm aware, bitfountain does some cool stuff, but this looks like it's not actually them. Maybe contact bitfountain.io directly to see what they say first?
this seems dodgy. the domain was registered a week ago
the t&cs say:
"Sweepstakes is not sponsored, endorsed or administered by bitfountain, nor is bitfountain associated with the Sweepstakes in any way."
the privacy link referenced in the t&cs doesn't work http://bitfountaingiveaway.com/privacy/
the home page is just a hello world wp page