This is what I was thinking. FB has reached the marketshare where it's fairly safe for them to relax the control they hold, because even if a variety of open ri

This is what I was thinking. FB has reached the marketshare where it's fairly safe for them to relax the control they hold, because even if a variety of open rivals appear, using the data that FB releases, FB will still be the centre of the action. Alternatively, there may be a parallel to IBM giving away the PC specs, inadvertently pushing the monopoly down to the OS and weakening their market position (though creating a tech boon for everyone that made the market so much bigger).