Why would anyone think that sticking a small electric fan onto an engine intake will actually help?
A supercharger requires something like 16bhp (20% of 80bhp) to operate (depending on design etc). This 16bhp is used to run the compressor. Now 16bhp is about 12,000 watts. How much power does your alternator produce, enough to run 12 hairdryers at once?
[As a side point a learner legal 125cc motorbike has less power than this]
I'd bet that any gains found with this product are down to the pod air-filter it comes with. If you removed the fan you get better performance from a clear inlet tract.