This is a discussion on vs Bad players within the online poker forums, in the Learning Poker section; Tournaments charge rake (8-15%) if you face players of the same level as you, just by rake you will already be a pretty losing player.
To be a constant winner, playing inside the bankroll is essential. It is not easy to play correctly when playing out of your limit and when the loss (or gain) makes a big difference bigger than it should. Play on the bubble or in the end of a tournament above what you can afford will inevitably affect your decisions, almost always negatively.
This is very true! If you take the tenth best player in the world and have him only play against the nine in the world that are better than him, that first player will be losing! So important to play in games where we have an advantage, and to be humble enough to recognize when that isnít the case!