COMPS

Comps

In the context of casinos, comps are complimentary items and services given out by casinos to encourage players to gamble. The amount of comps that a player is given usually depends on what game they play, how much they bet, and how long they play. Most casinos have hosts who are responsible for giving out free items and contacting players to bring them back to the casino. Pit bosses can also award comps at table games. Most casinos now require a player to have a player's club or similar card, so that their play can be tracked and comps awarded.

The above text is a snippet from Wikipedia: Comps (casino)
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