...distributing, participating in the creation of, or promoting in any way a software development kit derived from the SDK. I don't understand what Google is t

...distributing, participating in the creation of, or promoting in any way a software development kit derived from the SDK. I don't understand what Google is trying to prevent with this change. Is a "derived" SDK one that provides an alternative api to the official SDK, or extends it? Are there any derived SDKs in existence or being proposed? Also, does any one have any thoughts about if/how this affects mono for android? As far as I am aware, MFA is an api layered on top of the the SDK. Does that count as "derived"?