In the Pokémon games, when Payday is used, you can gain a small amount of money. The amount is however pitiful, so it's never used as an infinite money trick or effective money grinding strategy.
In the anime however, during the Johto League Arc, in one episode Jessie, James, and Meowth are copycatting a famous burglar who had a Meowth as a partner. In his escapes the burglar's Meowth used Payday like a smoke screen. When Jessie and James copycat, they do the same thing, however because Meowth can't use Payday, Meowth throws bottle caps belonging to James' collection. (When Ash, Brock, and Misty examine the "coins" they comment they are just bottle caps, after which you hear James in the background saying they aren't "just bottle caps".)
I am wondering however, is the money that's thrown out when Payday is used the same kind of money used in society in Pokemon? If so, then how is it people don't abuse the move to get rich? (For example, Team Rocket stealing Pokémon with Payday and using them to fund their criminal operations.)