So, I'm a casual live 100nl player but im always looking for ways to improve my game when I'm not able to visit a card room or casino. All of the poker sites offer the free "Play Chip" tables and what I was wondering is if anyone uses these games in order to improve their own game when playing for REAL money. In my short experience it seems that not many people play "seriously" when it comes to these tables. I see a lot of situations that I almost never see while playing for real cash. (3-betting with complete garbage, calling with complete garbage etc.) Is there really anything to learn from playing with people like this? Its obviously nothing like how a serious poker game should be played. Basically I want to know if you guys think there is any benefit to using these free tables, or if i should focus elsewhere on improving my game?

Thanks for any input!