No, they do not differ between customers. They are simply licensing a proprietary piece of software based on Qt, a *very* common thing among software vendors. Actually, proprietary offerings built with Qt has been the main money driver for all the open development. One may of course disagree with the business model. I for one tend to agree with you that copyright transfer agreements are bad practice. Nevertheless, I think you are missing the big picture totally here. AFAIK, there is no way all KDE programmers will sign such agreements, I know I won't. Even if that succeeds, Digia will have to keep a very tight balance. Any sign of evil tactics will see Digia left in the dust, with the value of their copyright reduced to zero. We can thank Oracle for a splendid example of how to achieve that. You see there are very strong forces behind Qt that will not tolerate Digia misbehaving. The only force behind Mono seem to be Microsoft and the abundance of software vendors on the .net band-wagon.
Regarding the Qt charts, there is already an open competitor for plotting. And it seems to be doing surprisingly well, considering the clumsy license the author put on it:
http://qwt.sourceforge.net/index.html Actually, I am pretty sure Qt charts will go open source or die.
In any case, please stop equating the Mono tragedy with Qt, it undermines an otherwise natural grievance. Moreover, jrch2k8 please refrain from ad-hominems, it only serves to weaken your argument, and you do have a strong case here.