Good on Matt for holding those greedy corps responsible, it is one of the perhaps few benefits to having Automattic around.

That being said, as other users have mentioned, even selling your app or offering various web hosting related services are technically against the GPL license in many instances.

Certain plugins have even been "banned" from WordPress for not attributing code to other plugin authors, which isn't required by the license in fact (at least to my knowledge).

TL;DR: Good on Matt and Automattic, but the license needs a lot more clarity (or evolution) and if wordpress.org or Automattic want to be the protectors of the realm, they should eliminate hypocrisy.