Just to drill into this a bit, the relationship between a community and single or multiple companies can be symbiotic or exploitative and likely ebbs and flows as leadership and priorities in the company change as well as the community politics.
There is good reason to be skeptical in general of these relationships but as others suggested, you’ll want to do some investigation. You should do your best to avoid generalizations like “red hat/canonical bad” and “permissive/copyleft licensed open source is good”! The real receipts of power come down to influence on the technical direction of the main project, the amount of alternatives to any given solution around a shared central project, and the flow of information (marketing, perceptions of the project, freedom to call stuff out). Most importantly, you must be careful not to assume that once a good ecosystem, always a good ecosystem, there are always changing dynamics that you want to keep a slight pulse on through various relationships.
This all is not easy to understand from a cursory view so you need to generally find a few people involved in the community and get their takes… But this also requires validating their opinions aren’t biased and fllawed. What is their relationship to the community or the corporations? Do they care more about community reputation or taking bribes?
It important to intentionally build up a network and RSS feed of micro journalists that report things from the communities you care about. This skill will become more and more important as we move away from centralized trust in corporations and governments.
Edit: @andreasglashauser may be one of those folks for Qubes :).
This is always something good to see the microjournalist (MJ) suggest too. That said, you will find a lot of noise doing this. What I find to be the best research is to get the MJs with different opinions and biases in a chorus and look for patterns between the stories they tell.