Serious question. Why are people buying these. I just did a quick break even calculation and assuming zero electricity costs, not including the PSU cost, and zero difficulty increases you break even in about 190 days. Obviously those are very favorable assumptions, probably very unrealistic.

Not criticizing the product, just really curious about it, since I mined for a very long time (before finally giving it up last year), and I've bought Ant Miners before, but I now find myself scratching my head. The numbers these days just don't seem to make sense to me.