I think since they've managed to minimize the screen bezel, they can fit a 14" screen in the body of an older 13" and a 16" in the body of an older 15"?
Yes, this is the case. (As the owner of a 16" MBP, which replaced a long series of 15" MBPs—with a 17" in there way back when they were still current.)
I don't think it was a spam protection bot since they removed a large batch all at once. But, they obviously know there is no point to remove another batch because it will backfire.
Lot's of what we (most other first world countries) take for granted is not present in the US.
Health care insurance for example can eat a good chunk of that 3.6kUSD: the average cost of individual health insurance premiums is $440 for an individual and &1,168 for a family, in 2018 according to eHealth [1]
That makes health insurance behave like a very regressive tax.
In contrast in Germany where they have compulsory insurance it is only 7.6% to 15% of your salary, so something between USD 273 and USD 540 for a family. See https://www.sympat.me/germany-healthcare-insurance/.
However I still wish they'd be able to get the bezel down to the size of an XPS 13