Exactly. The title is misleading because it implies we're talking about open source products that eventually became closed source (this happens, it's annoying,

Exactly. The title is misleading because it implies we're talking about open source products that eventually became closed source (this happens, it's annoying, and it's their prerogative). Instead it's upset that people use licenses that aren't the GPL. It's also one of the only projects I've ever seen to use the Affero GPL.