This is the crux of the problem. Where Prusa is openly sharing, you have companies that are benefiting from that without reciprocating. Part of the tax you're paying when buying an i3MK4 is the continued investment in the open source/hardware contributions of the company, not just the end product. Shelling out $1k for a Bambu is your prerogative, but it does cast a vote with your wallet for a company that is more predatory than collaborative.
So what, exactly, is your point here? Bambu is compliant and is reciprocating; OrcaSlicer derives from Bambu Studio and works great. Their printer firmware is not as far as anyone can prove derived from GPL software (and I tend to think that by now somebody would've found it), so they keep that.
Let's get to the brassest of tacks: one can talk about "contributing" until one's blue (or orange) in the face, but Prusa can't or won't ship a functioning, assembled-before-you-get-it multimaterial CoreXY for less than $2,500. Bambu came out the gate with one, not reliant on Marlin or Klipper, and it actually works.
I genuinely can't believe I'm having to point this out, because I think Bambu does suck as a company and sniffing about patents well-and-truly sucks, but they remain, and are the only, such bastard-coated bastards that can actually ship something usable at a price somebody can afford. $2500 for a Prusa XL would be more expensive than my CNC. I actually do need multimaterial, not for models but for tooling, so continuing to limp along with my collection of Klipper printers isn't reasonable. So what's your actual solution for a quality-outcomes tool at a reasonable price?
That being said, everyone I've interacted with at/from DJI have been fellow tech-nerds of the highest order, and I mean that as a compliment. I've enjoyed talking to people who are excited about building things.
The bigger problem seems to be that the i3 printers are table stakes now, while Prusa engine seized up and forward progress went to pot. The Prusa XL is not vaporware but it's close and preposterously expensive, while the MK4 released without input shaping in their extremely customized port of Marlin. Those "Chinese knockoffs" are shipping Klipper-based printers, with SBCs, where you get that for free.
And then you have the Bambu printers, which are OSS-compliant where required (their slicer is a derivative of PrusaSlicer) but built an in-house OS (not actually that shocking, and almost certainly not pirated; 3D printers just aren't that hard) that has given them a printer that's conservatively 18-24 months ahead of everybody except maybe Prusa with the XL. I really don't like Bambu's patent saber-rattling, that sucks, but they just shipped a better mousetrap, too.
Open-source 3D printing is on the ropes because it isn't making stuff as good as the closed-source stuff. Not because of cheap cloners. I didn't want to buy a Bambu printer so held out for the Creality K1 (and they are being bad citizens, they haven't released their Klipper source) and it's not good, I waited for Prusa to sell me on a Prusa XL but to get one I'll be waiting until 2024 at the earliest and spending $500 on that "preassembled" option to boot, and...Bambu just sold me a P1S with an AMS for $1000 flat. C'mon.