The ones I see making money on this are the 3D printer makers, suppliers of parts and raw material and a few that learned quickly not to get bogged down creating their own web site (in other words, set up shop with gomomma, goamazon, etc.)

My first printer as a manufacturing device was back in the 80's with a t-shirt printer. Later with some printed circuits from a printer. Later we had CAD to CNC then printing in 3D in the 90's.

Good to read you like the new stuff but I wonder at times if folk know how long this has been kicking around.
Bob