I'm in no way an expert, but looking at the practical implications of such a requirement, it would seem that such a requirement would make the GFDL useless for most purposes. Hardly any webmaster would archive every past version of a page.
Timwi
Civil Law is not meant to be practical. It's meant merely to be a roadsign that says, "our stuff, our rules" -- so that later it can look like a breach of contract, and money can be restituted from the prostituting party.
Ironically, the notion that "your not supposed to make $$ off of X" (as a claim) is kinda antithetical to the whole notion of lawsuits, which tend to be about "only Ims supposed to make money off X". And in the end, regardless of GNUFDL, a civil win would be represented (symbolically) in dough. Otherwise why would anyone bother forking out for a lair?
-S-
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