1 )
Beyond doubt the source code should be provided because IS modificated and not only by adding a script or plugin, should be something deeper if include Gimppainter tool
on the site there is not any link, ironically there is a clear reference to gpl
http://gimpmodify.blogspot.it/p/gimpmodify.html2)
Not only Gimp but also gimpainter and Ramon miranda GPS are included, that is clearly acknowledged somewhere along the lines of the product description but not where it should
(again here
http://gimpmodify.blogspot.it/p/gimpmodify.html there is no any reference or link for gimpainter or GPS)
3)
PSPI could not be packed within gimp ,but only as separate download
I believe here tolerable a smart installer that doesn't contain both, but after gimp install ask the permission to download and install , under a different license , also PSPI
BUT as it is NO... this is another clear violation
4)
And yes even if FOSS gimp may even be sold
But is not this case this product is free , require a activation code to unlock that is also free
Personally i found less irritant a prodoct with a price then a nag, as i see IN THIS CASE the activation code
Activation codes may be fine to reactivate trialware of commercial product , a very different matter, and in that contest is not a nag but part of the deal (you may use for 30 days, to use more you should pay to activate..more then a correct deal for commercial programs )
Here i see as a nag , that maybe is not forbidden in the GPL , but on this last point i was not invoking any law or licence , just giving a user feedback
Again i would prefer hear the author before reporting, i must say i only try only once and maybe i used a wrong form (i could chose 3 type , the differences between the 3 would be crystal clear if i was able to read Malaysian...alas i am not so i just chosed a random one )
maybe somebody else want to try ?