It is very clear how you get Netflix certified ("Netflix Partner Program"), manufacturers just want to save money in one way or another. First off you need to

It is very clear how you get Netflix certified ("Netflix Partner Program"), manufacturers just want to save money in one way or another. First off you need to be Google certified. Next you need to have high enough spec hardware to run Netflix smoothly (min CPU/RAM/at a min resolution with specific codecs). You also need to have DRM support (which, you guessed it, required certification). There is a direct cost in certifying (e.g. mandatory 3rd party testing) but also a much bigger cost in the "smart" part of the projector being powerful enough to deliver a GOOD Netflix experience. You're acting like manufacturers are confused, they aren't at all, they're making a cost/benefit decision on putting in cheaper hardware in exchange for no Netflix. My advice is to stop buying "smart" projectors at all, because the "smart" part is commonly cheap and bad.