If Amazon are actually making use of this patent it's a very interesting choice of approach.

I always thought the received wisdom about companies like Amazon and Google that maximise their revenues with very specific targeting was that their algorithms processed the statistics of people's behaviour and presented the suggestion/ad with the highest expected value without consideration of any qualitative explanation for why a certain thing is suggested.

This patent suggests categories are assigned to products to add artificial dimensions to the data. It's a little surprising, at least to me, if putting a label on, say, Jewish wrapping paper results in any more insightful profiling than noting that buyers of Menorah Pattern #1 wrapped gifts buy 4.6% more Kletzmer music than the average customer.

Tell that to the entire history of software uptake, ever.

Yes, but the ISS is barely 1% further from the centre of the earth than we are. The gravitational field strength is practically the same. The pedant is wrong because when you work in the rotating reference frame of the orbiting object gravity is eliminated on the orbit, so the language is okay.

RTFA. It shows them testing 3D printers in zero-gravity. No "luck" required, just sense.

If anyone's actually interested in the real answer to this, the wind tunnel they used appears to be called MARSWIT and to compensate for gravitational differences they use walnut shell dust among other particles as their working soil. To fully correct for gravity all you have to do is match the ratio of the air density to the particle density. Since rock is about 5 times denser than wood but Earth air is about 20 times denser than Martian air, they don't seem to be fully compensated - but perhaps at 80 mph equivalent winds the important accelerations are all much larger than 4m/s (g on Mars) and so the difference in gravitational effects isn't that important.