@candela:
Thanks for your positive post!
I also thought a lot if DVDfab will change their software to prevent that the VUK can be extracted from a memory dump - but personally I think that the VUK is only usefull for playback of blurays and although it can also be used to decrypt blurays I'm not aware of a convenient tool to do this.
So finally I don't think that somebody stops buying software from them because they don't sell bluray playback software
On the other hand it might be a reason to buy software from them to get the possibility to detect the VUK for certain blurays that couldn't be watched on a linux device otherwise...
But as I can't change it anyway I'm with you: get as many keys as possible as long as it works