Calling it "an offer we can't refuse," the founders of a photo-sharing service called Divvyshot announced Friday that the start-up has been acquired by Facebook. Terms of the deal were not disclosed, but it's clear that as with Facebook's acquisition of Parakey--and even the far bigger FriendFeed buy--this is an acquisition designed to get the engineering team on board.

Divvyshot, which launched with backing from the Y Combinator incubator, allows for group photo sharing: multiple users can edit albums, which are grouped around various events and places. As part of the acquisition, the service will be shutting down.

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