1. As far as I can see there's nothing illegal about this scheme - it's a perfectly valid business plan.
2. No one has yet received a PC because the scheme's founders clearly state on the site that no PC's will be delivered before the middle of February.
3. Similar schemes have been tried before, without success, and that doesn't bode well for this one. It doesn't mean that it will fail, but it doesn't look like the best bet in the worldd from an investor's point of view. That shouldn't concern you though - you have nothing to lose except some time.
The scheme may fail, or it may be an outstanding success, there's no way of knowing for sure. One thing that we should avoid though is giving an impression that it is in some way illegal, or is a 'scam' - because as far as I can tell it's not.