I have used a couple of passkeys that I got because they came with Guild Wars: Factions
Auto Assault is 10GB, and is really buggy. Couldn't log on in around 10 minutes, so I gave up and uninstalled it so I could have space. All the realms were Very Low server status.
I checked out City of Heroes to see if it was interesting, and it seems a bit pathetic. The only good thing about it that I found was the fact that there was a good character customization page, although it didn't really have enough choices. (Well, I mean it had a lot just they were all too similiar).
I haven't tried City of Villians yet, but I probably will get around to that sometime soon.

It looks like to me that out of all the games they spent money on, three of them failed nearly completely. I think that leaves them Linage, Linage II, Guild Wars and Guild Wars: Factions to pay the fees and make money.