The funny think about these PCB photos is: The I/O bandwidth bitcoin needs is absolutely pathetic even not worth mentioning. If that were actually a made product they would be very, very stupid to use such a expensive (many pins) packaging for the chips if there were ASICs inside and use it as a bitcoin miner.
If they were using a structured ASIC from somewhere like Altera or Xilinx, those are only available in specific BGA packages (at least if the marketing material is correct). It looks to be about the right number of balls for one of their FPGAs or sASICs too.
Edit: If it is a scam, I doubt you'll be able to catch them out on any of the technical details; everything so far seems to be just within the bounds of possibility.