I suppose the GPL3 is compatible with GPL3 minus part 13 ?
So if I added an AGPL link permission to GPL3-part13, AGPL users who modify (rather than link to) my work will not have the power to make me give to service users the source to my work combined with their patches.
And yet it would still be compatible with Apache, GPL3 and various others; as well as being AGPL friendly.
If only part 13 considered that rights-holders might not want to propagate AGPL enforcements and yet might still want to be AGPL friendly.
Perhaps their ought to be an "AGPL link exception" alternative to part13; if you deny license upgrades to AGPL you at least permit full linking.
It needn't affect the GPL3-source requirement of the AGPL, I don't care if AGPL service providers have to give out the full GPL3 source too, in fact I'd like it.
Sam