Whether or not you like Microsoft, ask yourselves, what if it was the other way around? Don't you think Microsoft would have sued?
Large companies and organizations (for example RIAA, which actually represents large powerful companies) have lots of money and influence, threatens (and pursues) with legal action against anything or anyone who supposedly violates the law (which they have some influence into shaping however it suits them) and their rights, but don't seem at all concerned when they do so themselves.
It's not necessarily about greed. It's quite possible they just want to remind those companies and organizations that they may have some control, but they don't own this world and everything in it.