First of all I dont understand, why people get upset about bad beats in freerolls. So someone went all in with 72o after just 5 minutes, you called with AKo, and he "sucked out on you". But so what, you paid nothing to enter, and when you bust quickly, at least you did not spend a lot of your time figthing 2.000 other players for a 200$ price pool. So my main tip for freerolls is, dont take it so serious!
But apart from that there are strategies for beeting very loose opponents, who "call with anything" both post and pre. And since you also find these players in paid tournaments, just less and less as the tournament fee goes up, you need to know how to play against them. And for that freerolls can be a good training ground. Its not rocket science and can basically be boiled down to the following:
1) Use large bet sizes for value
2) Widen your value range
3) Dont bluff
Just play solid poker and keep your calm. As someone wrote in another post recently, if you open A9s to 3BB from MP, and now BTN moves all in for 150BB in the first hand of the tournament, then just fold and let him have it. Or let someone else call and try to get a quick dubble. Let the worst goofballs bust each other and dont get involved in preflop all-in spots, until blinds have gone up, or you have a really premium hand.
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