It sounds to me like the issue isn't so much with Google then, but that you don't believe the legal system is fair (which I generally agree), but that is a different issue entirely.
It's possible that they banned someone by pure incompetence. I've definitely had my fair share of companies provide terrible service by probably just following some automated system as they are told. However, it is also very unlikely that there is a grand conspiracy on their part to ban people to simply maximize profits.
They do provide a pretty lengthy legal contract and terms to developers, which are partially outlined in this article. I think they just realize that the ball is in their court, and if the company wants to sue them then that is when they present the evidence.
I agree that it would be helpful for people that legitimately don't know and may have made some minor mistake to get more information to correct it, and prefer businesses be transparent when implementing their policies, but from a purely legal perspective it makes sense why Google doesn't do this.
I would want any company that is abusing their power to face consequences. However, it wouldn't surprise me one bit to find out that some of these companies complaining about getting banned are legitimately doing something wrong and their only cards to play are hoping for a political reaction, rather than suing Google in court and being exposed for why they were actually banned.
I don't really see any mention of it, but do you at least have some idea of what may have triggered this issue? I see that your open-source Android app is serving ads. I'm also curious why your app isn't on F-Droid?
If they want it to be taken seriously by the open source community, might as well start with mail clients used by the top contributors to things like the Linux kernel and core open source libraries used in most Linux distros. This is how to help ensure adoption and making it a replacement for IMAP.
When it is released it will likely be as buggy as WSL is today. WSL is over 20x slower due to Microsoft's crappy filesystem. They are still using a custom kernel even though it is a VM now. I don't have high hopes about their terminal either.
Because Microsoft is a profit-hungry monster and their "adoption" of open source was the only way they could stay alive longer. It never had to do with doing what is good for humanity.
Get developers locked in to a centralized ecosystem like GitHub, spread the marketing far and wide you use tools based on centralized platforms, encourage developers to utilize frameworks and programming languages that have poor support for open source platforms, etc.
GitLab actually has an open source SCM platform and developers have always been free to put links to their favorite sponsorship platforms in the readme, wiki or on their GitLab Pages site built using their favorite generators. Your move GitHub.
17 independent sources doesn't mean anything. Again, this is the same as the sources that said their were weapons of mass destruction in Iraq. Companies and government use propaganda all the time, so until you have more information confirming these claims, then it is best to hold off before trying to say that Apple and Amazon denying the claims str proof that they are real.
Def possible they are lying. There are a lot of companies competing with white box manufacturers. If you can't name a single source, and you have two major companies saying these claims aren't accurate... then maybe you should hold off before making judgments.
So not a single source. Might as well be going to war over invisible weapons of mass destruction. Also, Apple and Amazon both has said they do not agree with these claims. So far this is nothing more than propaganda.