This would allow users much more freedom in buying, and this could alleviate many of the feature requests asking for games.
What you’re referring to is also known as a much larger project: SaladPay.
As far as I’ve understood it, SaladPay would bring the Salad Balance as a payment method in your favorite shops, and allow you to buy things directly (probably with some fee).
But this system is still in development, and will take some time to be implemented in larger companies and everywhere one might buy items.
or just redeem a visa card