I have an Elegoo Neptune 3 Pro which I may upgrade at some point, so I've been following the Bambu situation since it became news. But I'm not terribly well plugged in to the 3D scene, so apologies in advance if what I'm about to suggest is silly or otherwise not practical.
How about setting up an open cloud service which can fool Bambu printers into using it instead of Bambu's own service? I get that might not provide some of the features and capabilities that would rely on tight integration. But it would give Bambu purchasers an alternative when they (probably inevitably) get too pissed off with "Bambu Deere" having who-knows-what access to their printers and their possibly-proprietary designs.
That might be the opening shot in a war of attrition on both sides. But it sure would get a lot of attention, and it would be yet another strong "NO" message to corporate overlords. The motto of everyone who doesn't financially benefit from Bambu-style overreach should be "jail-break EVERYTHING".