Thanks, and that wasn't rude at all.
But again - those 27 million users are almost certainly already on Facebook. If Facebook came out with 'Hipster Pics for Facebook!' (obviously I should not be in charge of naming things) then I would assume the vast majority of those users would begin using 'Hipster Pics for Facebook!' instead of Instagram.
I guess it would make some sense for G+ to buy it in the hopes of driving use of G+ with it...