Is this site claiming to be brazilian based? Brazil's got one of the most expensive energy prices. I am surprised nobody ever took a look at this. I am struggling to mine with solar panels (and being robbed by waldohoover) here. No way somebody is mining 850gh/s in Brazil. He would need to have a gigantic solar farm or steal electricity which would be easy at small scale but very hard at such scale, not to say impossible.
I doubt he is brazilian. Marcelo Santos is a very generic name, Marcelo is one of top 10 first names and santos top 3 surnames.

if this goes by the 0.01% possibility that is not a scam, I would love to visit their farm!