Re: Exploiting Tight/Loose players
That idea is very dated. Where have you been?
Back in the old days nits used to just play premium hands and setmine and then start betting big when they hit to take advantage of loose players who were typically bad. It did of course work, but it was never anywhere near optimal. It was just an easy strategy to execute even if you weren't very good at poker.
At the same time, if you saw the table was was very nitty, you could open up your range a ton in late position and steal the blinds with impunity. Again, it was easy to execute and profitable even if you suck at poker.
If you're good at poker though you should be looking to play pretty wide ranges against bad players who are typically playing even wider ranges and still play wide ranges against nitty players who aren't very good post flop since you can read hands better than they can and will have an edge on them postflop.
That is why a good lag is going to make more money than a good tag imo.
As you move up in stakes however, and players ranges gravitate closer to something resembling optimal it gets harder to play looser and get away with it.