Magical Poker Chips

On the table there's a case of poker chips. In contrast to most poker chips, however, these are magical.

There's a small pamphlet in the case, explaining the rules.

If you gain someone's Magical Chips in a fair move, you can change their owner according to your whims.
$10: Minor change: (inch of height, hair color, social aesthetics, a year of age, preferences, interests and minor experiences )
$100: Moderate change: (foot of height, decade of age, ethnicity, gender appearance, body shape, minor personality trait, life interests, short relationships)
$200: Major change: (half or double height, twenty years, sex change and body appearance, major personality alterations, rewritten past, major relationship)
$500: total change: (reality completely altered for loser, winner only one aware of change if they desire it.)
2x the price: Make the loser unaware, x1.00 if everyone is to be unaware.
1.5x the price: Make the loser aware but accepting of changes.
Former changes can be enhanced or built upon up until $500.
Those unaware of the rules that gain chips, make changes to the loser without awareness.
Changes are not noticed by third parties (unless you change them to become aware of specific changes for $10) and reality adjusts to compensate.
More than two players: Winner decides how to distribute the pot among the losers. A draw pot can't change others.
Custom rules? Write them on the blank lines below on this pamphlet, or strike out rules you don't like.

Now, what sort of situation are these chips going to be used?