benny, a closed source project cannot take anything from the community by just being on maemo.org They can make use of some products of the community (like using open source library) but they will do it regardless of being on maemo or not. But they cannot decide over community or take something from it: "next two hours will fanoush debug our crappy application instead of doing one of his amazing hacks." Community can decide to give them something, but they cannot take it.
It was almost obvious that the closed application thought was canola, I believe it is one of the most successful applications for itt. I do not see reason it could not be on maemo.org