I think that it all depends on what you are looking for in your game. Of course everyone is looking for money but what you invest is different.

Some people don't like to invest much with a high return while others are comfortable investing into a game that could potentially pay big. I guess that really just falls back on how much money you have for poker and your skill level.

If you are ready for buyin games and can afford them- then it's most likely not worth your time to play freerolls.