In my last post I told you about history of casinos, now here are some details about how they work
Customers gamble by playing slot machines or other games of chance (e.g., craps, roulette, baccarat) and some skill (e.g., blackjack, poker) .
Games usually have mathematically-determined odds that ensure the house has at all times an advantage over the players. This can be expressed more precisely by the notion of expected value, which is uniformly negative (from the player’s perspective). This advantage is called the house edge.
In games such as poker where players play against each other, the house takes a commission called the rake. Online Casino often give out free items, known as comps to people who are gambling. Often, in most casinos, the more money a player uses the more benefits or comps the player get.
Comps are determined on a formula set by the casino based on the player’s average bet x the number of hours of play x the percentage that the casino will win on the player. Whether the player wins or loses does not matter; it is solely based on the formula.

Comps can range in anything from free drinks during play to penthouse suites, free airfare, limo service, and free food that’s the best part of IT.
That’s it for now, will post some more details soon.