I could imagine a four way split as follows: Instagram Whatsapp Facebook the site, which is required to sell its user data to third parties (think large ad ser

I could imagine a four way split as follows: Instagram Whatsapp Facebook the site, which is required to sell its user data to third parties (think large ad services) Facebook the advertising service, which buys userdata & advertising space from Facebook the site and sells it to third parties. The final two separations are not particularly likely in my opinion.