Almost all advancements that happen in slicer are driven by open source. Bambu is a follower in this regard. As you can clearly see from their attempts at software they are not the top dog so they can benefit greatly from open source. Even in regards to „cloud security” that they so desperately want. I read somewhere that even their printers software is not 100% proprietary if I remember correctly it is utilising Linux/android for some of the functionality.
So yes, I stand by what I said. They are benefiting greatly from the open source software without giving back.