Not to be a stickler, but this is a pretty basic and fundamental part of the Open Source model, note the meaning of "Free Distribution" below (the MPL, and almost certainly the ZPL by derivation follow):
by the way, you all wake up too early.
D. The Open Source Definition.
The Open Source Definition emphasizes the three key elements of free distribution, readily available source
code and the right to make derivative works. The Open Source Definition contains nine separate provisions and then
provides a list of licenses that conform to the Open Source Definition. An understanding of the provisions of the
Open Source Definition is essential to any discussion of Open Source and this section of this Article will set out the
nine elements of the Open Source Definition.
1. Free Distribution. “The license may not restrict any party from selling or giving away the software as a
component of an aggregate software distribution containing programs from several different sources. The license
may not require royalty or other fee for such sale.” 46
This section means that the license may make copies, sell or give away the software and not have to pay any one
for the privilege. Open Source Definition: Version 1.0 Comments, reprinted in Perens, supra note 17, at 176-80
(hereinafter OSD Comments). See also Gomulkiewicz, supra note 8, at 179 (discussing each section of the Open
Source Definition in detail).