Reward

"Illustration" courtesy of:  https://www.craiyon.com "golf clubs"

Some "casinos" have "reward programs".  They're also known as "player's clubs".

When "dollars" or "points" are "posted" to a "player's" account, where does the "money" come from?

It is "real" money after all:

• When an amount has been "committed" to a machine it's "played" as "real" money.
• Winnings accumulate as "dollars" (all wins and losses are in "currency") and can be "withdrawn" through an automated or human "teller".

So... what rules determine the amounts "paid" to a "player"?

And how can a casino "print" cash out of "thin air" into "accounts"?

Is anyone else uncertain how banks work, backward?