Microsoft paid certain developers to port their mobile apps to W7P, they even gave developers who were simply making new mobile apps money, and told others they were out of luck. Then they paid Nokia 1 billion dollars to abandon QT and MeeGo for Microsoft.
Why would any mobile developer touch this platform free of charge when Microsoft has consistently shown that they will do anything for market share.
I am on the partners mailing list and I have seen no cash offers for development.
So F that.
"hey, I'm going to be the sucker that develops for your unpopular platform for free, just because I am that gullible"