https://www.pcgamer.com/tekken-8s-unexpected-introduction-of-paid-cosmetics-is-splitting-fans-while-producer-says-players-should-update-their-thinking-to-the-current-environment-of-game-development/

The one thing that isn't mentioned is how these Tekken Coins will be bundled. Take Street Fighter 6's paid costumes: The skins Capcom added back in December cost 300 Fighter Coins, which is around $6 each. Except you can't buy bundles of 300 Fighter Coins. The minimum is 250, meaning you'd have to spend around $10 just to secure one costume. I wouldn't be surprised if Tekken 8 takes a similar approach, meaning that the actual money required to procure cosmetics is higher.