all) between sizable wins. Therefore, for high-stakes players who specialize in tournament play, multi-accounting is one possible means to allow a player to play more entries in major tournaments than they would otherwise be able to, potentially multiplying the player's earnings and, just as importantly, making earnings more consistent over a shorter period of time. This risks a large win by a hitherto unknown "player" attracting scrutiny from the host (and other players), especially if the winner has no known previous poker experience but does have clear ties to a better-known player. In addition, some sites now offer multi-table tournaments where the same player can enter multiple times under their own name, so as to reduce the incentive to multi-account. Another concern is datamining. This is the systematic collection of hand histories, enough of which can be used to profile opponents using specially designed software. Two or more players may agree to share their individual hand histories amongst themselves; alternatively some websites offer large quantities of previously-played hands (even millions) for a fee. Using software to analyze one's own histories is generally accepted. Acquiring histories of hands in which a player did not participate violates the rules of most cardrooms. Poker software, like all software, cannot be assumed to be reliable. It is always possible that a person is exploiting the software to win money from victims. The software may even contain a backdoor which allows a person, perhaps an employee, to view cards. Absolute Poker was engaged in such a scandal along with site consultant and notable poker player Russ Hamilton. As of 2007, Ultimate Bet faces a lawsuit with allegations of employees exploiting the software. The user agreement of the two online poker sites owned by Tokwiro Enterprises, Absolute Poker and UltimateBet, state they reserve the right to cancel an account if a player plays "in a professional sense" (and not for personal entertainment only). This is not a standard prohibition. For example, it is not in the end-user agreements of the three largest online cardrooms: PokerStars, PartyPoker, and Full Tilt Poker. Angle shooting Angle shooting is engaging in actions that may technically be within the scope of the rules of the game, but that are considered unethical or unfair to exploit or take advantage of another player. For example, an angle shooter might motion as if they were folding their hand to induce other players to fold