James
Per "the Foundation has decided", it is not the foundation but our movement that has decided that we will mostly only allow licenses that allow commercial reuse.
That doesn't seem quite right. The Foundation Board adopted a resolution on 23 March 2007, which is published at https://foundation.wikimedia.org/wiki/Resolution:Licensing_policy and cross-referred to on Wikipedia as still current, headed
This policy is approved by the Wikimedia Foundation Board of Trustees https://foundation.wikimedia.org/wiki/Board_of_Trustees. It may not be circumvented, eroded, or ignored by Wikimedia Foundation officers or staff nor local policies of any Wikimedia project https://foundation.wikimedia.org/wiki/Our_projects.
and statng
- All projects are expected to host only content which is under a Free Content License, or which is otherwise free as recognized by the 'Definition of Free Cultural Works' as referenced above.
So it seems to me that it is the Foundation not the movement that controls the licensing.
Thrapostibongles