Same as it has been already, for example Snap, FreeOffice.
Where there are issues these are addressed.
You can't really measure that. But, look at Cleanjaro. There are things that Cleanjaro did which made it back into the main editions, and which prompted other changes.
Issues with grub-quiet led to grub-vanilla, which in turn fed back into the main grub package.
The team is still part of the community. The decision-making process will not change, and the project is independent of the company.
For example, if the company wants to support a particular piece of hardware then the company will create their own spin etc. for that hardware. The resulting packages will be available for all to use, and nothing in the main editions will change to specifically support that hardware (maybe apart from adding drivers etc.).