Of course everyone else made a good point ... that's not a lot of games to be picked up and published by the developer.
Both Portal and CounterStrike were professionally developed and funded by Valve, so don't exactly qualify as indie games. Then again how many Blitz, DarkBASIC, Torque developers have enjoyed as much success as the Portal and Counterstrike teams?
I don't think it's fair to compare the traditional Blitz/DarkBASIC/Torque developers, who are mostly part-time developers with limited funds, to games professionally developed and funded by Valve, one of the largest developers and publishers in the industry. But sure, I'm guessing GarageGames (formerly Dynamix) are doing fairly well for themselves.