Facebook has obviously partnered with some Bank to introduce some Private Blockchain based technology or some Alt coin in the future. This move <to Ban other coins> is probably the first step to protect their arrangement with their future partner. If they announce these two things together, then their strategy would be too obvious.
My prediction is that Facebook would soon announce a new Blockchain based payment method for their own Facebook Market place feature. <They are probably still developing this technology or finalizing talks with their new partners>
My best guess is Ripple <BankCoin> or Ethereum for this partnership, but they might surprise us with a new technology, based on the Blockchain. <I will also not be surprised if Mike Hearn {R3's lead platform engineer} and his Bank partners are behind this>
What do you think?
Probably they just don't want to be involved in scam advertising to avoid further legal claims when we'll see a lot of project crashes which ran ICOs today. If they don't take part in all this industry no one will be able to blame them for complicity in someone's money loss. Many of ICOs are pure scam today. It's also inevitable that a lot of non-scam projects who ran ICOs today won't survive or won't be able to keep all their promises according to their roadmaps and they will exist until the moment they spend all the ICO money. And only a few of them will be a success. So when a lot of "where is our money and where is our profits" questions or maybe some kind of legal claims pop-up, Facebook will just say that they don't have nothing to do with that, it's all their users fold who advertise scam.
And yes, there is rumor that they have a group of developers who work hard on their own blockchain and probably coin. Maybe they will use it for payments inside their advertising ecosystem.