"You are not allowed to sell…" is misleading / confusing

[Aleksej S.]

http://virtuemart.net/features/what-is-virtuemart says "You are not allowed to sell software that includes parts of VirtueMart Code."  Although the intended meaning of this is explained at least once at this forum, the other two attempts are ambiguous at best, and wrong at worst; and it would be better if it was clear from the main page on the subject.  Please see FSF's / GNU Project's article "Selling Free Software".  Please fix that.  Thanks.