Says Wildeboer: "One thing is extremely obvious. Microsoft wants to keep its platform clear of Free Software. Period."
Article 5 of the Application Requirements section in the Marketplace Application Provider Agreement specifically states (via Thinq):
The Application must not include software, documentation, or other materials that, in whole or in part, are governed by or subject to an Excluded License, or that would otherwise cause the Application to be subject to the terms of an Excluded License.
In the "Excluded License" section earlier, the GNU General Public License is named, along with any "equivalents."
Furthermore, it appears that even closed-source apps will be banned if they use open source libraries, which many developers do.
Written by: Andre Yoskowitz @ 18 Feb 2011 2:22