It works well too with decent paying freerolls, everyone will take it real serious for the first hour, then people get sloppy, so you play aggressive when they are all playing tight in the beginning, and u clean house with nit play while everyone starts getting antsy
This is about the complete opposite of how most people playing those freerolls play. The majority of people playing in these will be one of about 3 categories... The first being the extreme beginner, who doesn't know much about the game and will be playing any two face cards, pocket pair and connectors(suited or unsuited) and they will have a very hard time giving up any kind of a hand, even if the board screams at them they are beaten.
The second type of player is what I call the freeroller, because all they live for is finding freerolls to play in, but they play slop the whole time. Many times, these are the players that are out of the tournament within about 10
hands, because they play very aggressive witch any hand to try to double up to a decent stack relative to the rest of the players, but when they don't double those stacks up, and they get a little down on chips, they push, with just about anything, hoping to get lucky...then they bust and they're on to the next freeroll. It doesn't matter to them that they aren't playing good, because who cares, it isn't costing them anything, right? When/If these players get lucky and build their stack up to a decent size, they will loosen up and then just play ABC poker for a while and try to slide into the money.
The third category of player plays straight forward poker. They are usually a little bit more advanced than the freeroller. They will play just about the whole game tight and really hammer the pot when they get a premium hand. They don't play many hands, which if they were playing with better players would really screw them(cause whenever they bet/raise a hand, you know they have something), but they are playing with people that don't pay attention to those details, just their own hand. I would say these players are the ones that are most likely to make it further in the tournament, having to loosen up once the blinds get higher.
Obviously, these are just my observations, I am open to argument. I have not played a public freeroll for a long time, these are just what I remember about them.