Ummm...... are you not aware that HP make the majority of their TOTAL profit from their inkjet printer consumables in spite of compatibles being available ?
I'm not sure that the 3d printer market is quite ready enough for the razor blade model (yes I know XYZ is doing it already, or attempting), that model depends on people who are
1. not technically capable of avoiding it
2. not motivated to avoid it
given the complexity of operating a 3d printer (or rather, the general complexity of 3d modelling), it's still high cost (for a consumer "friendly" type), and it's fairly niche applications, I think that rather a large proportion of people who buy a 3d printer are both technically capable, and motivated to avoid any razor blade business model.
I've noted that quite a lot of DaVinci 1.0 machines are coming up second hand with little usage here in NZ, the machines are being sold by a large stationery chain here and I suspect that people buy them, find out it's too hard or not that useful, and flick them on, the people who pick them second hand up are even less likely to succumb to the razor blade model I suspect.
To add to this, it should be noted that XYZ are or at least have in the past put in work to defeat the hacks, which perhaps is an indication that the hacks do have a significant impact on sales.