The SP20 is a retail level product introduced at a time when retail level mining is quickly becoming a thing of the past, except for those with free electricity or
those willing to take a haircut on the 'investment'. It'll probably be popular in countries with currency controls.
I live in a country with strict monetary control (Venezuela), almost free electricity (0.002Kwh) and I'm not buying!!!!
Well gosh, there goes that theory. So why do people buy something for 2.5 BTC that is worth 1.3 BTC ?
Answer: because they can ?