Orks da best said:
The only true valve games are the half-life ones. All the other games are either: Mods, made by another company that is taken over by valve and the game is relesed with a valve logo, or a remake of another developers game "dota 2 anyone?"
At least EA allows the company to keep their logo on their games.
Uh no... in fact they've taken the mod teams of the original games, the entire teams, in the case of Portal and Team Fortress, on board, and had them head in the project to design the games based on their work, which was funded and published by Valve... for you know, Portal, Team Fortress 2, Counter-Strike and Dota 2... which are the ones that weren't entirely developed by designers already present at Valve...
Valve had as much in developing and publishing those games as anyone else... seeing as how it was their design teams, creative directors, budgets, and almost everything else that did the leg work...
EA on the other hand take over a design studio and crunch them for as much shovelware and crap as they can before collapsing them and eating their children...
OT: and to answer the title question, seeing as how all the questions you asked in your post were for the most part all rhetorical...
Valve treats their customers with respect and release great games at reasonable prices... which makes all the difference in the world...
Beyond that, Valve as designers have pushed what we understand about games... they have a very high standard of design quality and pacing, and more than any other company in the entire industry, really understand and implement interactive storytelling and player driven narrative, in success...<.<