Anything developed after the game was finished and released as far as I'm concerned. Basically, what used to be known as "expansions" to add on to the game or prolong its life. So long as its substantial of course. Charging money for something like a weapon skin is really lame no matter when it comes out. A recent example of DLC/expansion that I support is what Dark Souls 2 has done with the Crown Trilogy thing. While I didn't get them myself, that's a pretty decent way of doing it well after the game was released in a full, complete form.