> Plugins and themes for Q2A are your own separate code,
> and even though they depend on Q2A you don't need to license them under GPL.
> You can make your own license to prevent people from selling them on (modified or not).
For preventing other user's misunderstanding, I will point out. This statement is incorrect. Themes and plugins are not independent of the Q2A. In other words, they will work (be linked) with Q2A. Therefore, themes and plugins must be applied GPL or compatible license.