Cketti has decided to become a full time open source developer, got promoted to implement jmap into k-9 for 6 month and wants to go on to make a living out of k-9.
That’s a sole decision he made for his very own sake. It’s all open and transparent if you do a little search.
It’s no fault to get payed for open source development, but if going this way, a fork would have been the way to go, imho!
Contributing to an oss project and taking it over to get payed, do fund raising, etc is something completely different.
May I ask when the project has decided to be owned over to cketti and provide his living?
A clean, honest and honorable solution would have been to fork and go on from there, doing what one likes with the forked project. That’s what forks are for and there are quite good examples in the oss world!
The way cketti went is quite questionable, imho.
Leaving k-9 as it is, fork it, rename it and do whatever you want with it would have been ethical!