It allows for a tiered system. Average users will use the token entirely within the Facebook ecosystem. Advanced users will have the ability to withdraw their tokens from Facebook's system and utilize them on other platforms.
Look at Paypal USD Balance. It's really just a "token" issued by PayPal, an IOU where 1 PaypalUSD = 1 USD Debt from Paypal. But PayPalUSD can only be used within Paypal.com. The only way to bring PayPalUSD outside of Paypal is to call in your debt to PayPal and withdraw the money to your bank.
PayPal has always said that their success relies on people holding PayPalUSD. People who keep their money in PayPalUSD are the ones making PayPal bank. First of all, it costs Paypal next to nothing if that user sends their PayPalUSD to another user. Yet they collect transaction fees. Furthermore, PayPal can throw this money into low-risk investments and earn 3-4% on it.
Facebook tokens are PayPalUSD 2.0. They can be used within the Facebook.com ecosystem. But on top of that, people can withdraw them and use them outside of Facebook.com. Basically, any website can start integrating these FacebookCoin. It means less people will need to cash out, and will instead keep their money in FacebookCoins.
That doesn’t require a blockchain based system though. A single entity can secure a crypto currency.
You can convert PayPal directly into US dollars at your bank, so I don’t think they would see any benefit to supporting such a distributed token system unless the could make a cut on every transaction.
I’m having a hard time seeing Facebook being able to support a stable coin without being subject to the same regulations and cost as any other system.
Perhaps they will get a competitive advantage through data mining and could charge smaller transaction fees.
An IOU isn't automatically a token though. For the token analogy above, there is no reason for the arcade to start using blockchain instead of little metal tokens (even if there is some marginal benefit of the new tokens being usable at any location, and that the metal tokens no longer need to be produced).
We could trade arcade tokens wherever we wanted, but we don't because there is no expectation of value received for the token holder. If Facebook doesn't open some ecosystem for their coin soon, the whole measure seems to be nothing but a database (as parent commenters have noted).
Look at Paypal USD Balance. It's really just a "token" issued by PayPal, an IOU where 1 PaypalUSD = 1 USD Debt from Paypal. But PayPalUSD can only be used within Paypal.com. The only way to bring PayPalUSD outside of Paypal is to call in your debt to PayPal and withdraw the money to your bank.
PayPal has always said that their success relies on people holding PayPalUSD. People who keep their money in PayPalUSD are the ones making PayPal bank. First of all, it costs Paypal next to nothing if that user sends their PayPalUSD to another user. Yet they collect transaction fees. Furthermore, PayPal can throw this money into low-risk investments and earn 3-4% on it.
Facebook tokens are PayPalUSD 2.0. They can be used within the Facebook.com ecosystem. But on top of that, people can withdraw them and use them outside of Facebook.com. Basically, any website can start integrating these FacebookCoin. It means less people will need to cash out, and will instead keep their money in FacebookCoins.