Amazon's DocumentDB, MongoDB, and TechCrunch

Over on TechCrunch, you can find an article posted just yesterday with the inflammatory title AWS gives open source the middle finger. The premise of the article is that, by creating a product which aims to provide compatibility with MongoDB, Amazon is attacking open source.  This is a false narrative.  MongoDB recently relicensed its code in such a way that it can no longer be used by cloud providers without paying license fees to MongoDB.  In essence, then, TechCrunch is claiming that because Amazon is choosing to run code for which they don't have to pay license fees instead of code for which they do have to pay license fees, they're attacking open source.