They also accept contributions released only under the no-commercial-use-allowed license, so any dual licensing under a commercial-use-allowed license would be out of the window once a contribution gets merged.
Not sure what their business model is if they forbid commercial use. I guess selling commercial use licenses in violation of the no-commercial-use-allowed license?
Looks cool, but this info should be easier to get to. Tell us what resources we get in a "nano", "micro", etc. and how much they cost. That's the first and usually only thing I look at with these.