I was going to reply by including the summary on OpenLetter, but you've finally found it.
For those who want a quick summary. At the very beginning of Organic Maps there was Maps.Me which was eventually bought by one or more Russian companies (according to wikipedia) and now 5 companies are involved in its development. Following the first purchase, a fork was created to perpetuate the open source nature of the project - I even believe that the original creator or main maintainer of Maps.Me contributed to it.
Organic Maps was initially set up as a Latvian company to facilitate funding, but so far nothing had moved in the direction of a not-for-profit foundation (which was the goal for many in the community). Except that there have been suspicions (first of all) of a lack of transparency regarding the donations received, in particular the funding of personal trips (even if this could be understandable given the work carried out), which was only with the donations of contributors. And it seems that a developer was hired without the knowledge of the community, who realised several months later that there were bits of “proprietary” code.
Another problem was the Kayak travel comparison tool, which was integrated into the application with very little prior consultation. And some of the shareholders and instigators of the project to port Maps.Me to Organic Maps had recently asserted their primacy over the project when the first criticisms arrived this year, believing that despite the open source it was their project alone.
So CoMaps forked to try and re-establish this connection to the community, dear to OpenStreetMaps as well as to the contributors and users of Organic Maps. Obviously, as I didn't follow the beginning of the drama, these are just reported words and I encourage you to consult the link in OP's Edit.