@samgaw Thanks. We are on the same line here. I am concerned with two things: the different unclear open source licenses and the irrelevant argument of MM that a different user UI-Theme cant be done because of "security".
It seems there are other arguments at stake and as long as we dont understand exactly what, MM does not seem an Open Source project in its heart. Which is sad, but still in the right of the owners, provided all are honest and open about it . So, as honesty is an important factor and at stake, for now we also opt out ...