That's sorta the point. By RAW, it is legal, even if it is ludicrously broken. You were wondering why the Iajatsu Factotum is so highly recommended, and it's because of those exact two reasons:<br/>1) In most games, Iajatsu is not a class skill for everyone, it's a class skill for two or three classes in the entire game, of which Factotum is one.<br/>2) Nothing in Cunning Surge or the Dungeonscape Errata limits it to 1/encounter or even 1/round.<br/><br/>RAW is the standard for optimization discussions because no one can predict a GM's houserules. As a direct example, I wouldn't put any limit on Cunning Surges/round (in a non-gestalt game at least), I'd just compensate by having encounters that didn't feature one single monster, but multiple slightly weaker ones. Build advices and handbooks can't predict which of our DM styles might actually be in play, so by-the-books is the only way to find common ground.