As for this specific case, IANAL (ooo...), but I would think that as long as you're not selling the actual interpreter and modules, then you've got nothing to fear. You're allowed to sell perl code. Package the two parts separately, one you pay for (yours) and one you don't (everyone else's).

The GPL puts no restrictions on selling code (the linux distributors would be out of business if this were the case). The GPL is concerned with the distribution of software. Check out http://www.gnu.org/philosophy/selling.html.

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Coyote

In reply to Re: Re: ethical software development by Coyote
in thread ethical software development by dshahin

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