azz:
"According to FSFEs first glance, the "Microsoft Permissive License" (Ms-PL) and "Microsoft Community License" (Ms-CL) both appear to satisfy the four freedoms that define Free Software. In particular: The Ms-CL also appears to implement a variation of the Copyleft idea, which was first implemented by the GNU General Public License (GPL)."
"Given previous Microsoft statements about the Copyleft approach and in particular the GNU GPL as 'viral', 'cancerous' and 'communist', seeing Microsoft now publish licenses applying the very same principles seems quite an evolution."

azz: "According to FSFEs first glance, the "Microsoft Permissive License" (Ms-PL) and "Microsoft Community License" (Ms-CL) both appear to satisfy the four freedoms that define Free Software. In particular: The Ms-CL also appears to implement a variation of the Copyleft idea, which was first implemented by the GNU General Public License (GPL)."

"Given previous Microsoft statements about the Copyleft approach and in particular the GNU GPL as 'viral', 'cancerous' and 'communist', seeing Microsoft now publish licenses applying the very same principles seems quite an evolution."