The obvious advantage for Microsoft is that they can now influence OSI. Even if they don't get voting rights immediately (which I would expect them to push hard

The obvious advantage for Microsoft is that they can now influence OSI. Even if they don't get voting rights immediately (which I would expect them to push hard for) there will now be the everlasting threat of pulling the funding to keep OSI in line. Organisations sponsored mostly by companies can't be expected to be bold about upholding users' rights and keeping the moral high ground, because most organisations are willing to compromise to keep themselves alive. Now it remains to be seen if this is a dark day for FOSS or just for OSI.