Split it into Facebook back-end, Facebook Red, FB Green, and FB Blue. FB back-end is the current back-end. The Red, Green, and Blue are separate front end that

Split it into Facebook back-end, Facebook Red, FB Green, and FB Blue. FB back-end is the current back-end. The Red, Green, and Blue are separate front end that all have equal access to the back-end so a user of FB Red can friend a user of FB Blue. FB Red, Blue, and Green compete with each other on prices they charge to advertisers and can change their user interface to compete for users. Any user can use any one of FB R, G, or B and to get full access, but with their preferred UI