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Modules don't need to be GPL, even if someone will "try" and make a free version ...doesn't mean it'll be better, especially if its "non-gadget" oriented.
I think GPL is great, but it kills jobs, and takes ressources away from ppl that try to make a living off coding... Cause of the more general thinking: Oh the main program is GPL, so everything else should be free too.
GPL was meant to keep ppl like MS from locking down the source by making it proprietairy, not to create some new freeware trend (which it's unfortunately become).
Of course if ya like a product and they have a donation page or whatever..well contribute something to them