You gotta pay for that post: one whole dollar.
Well. As of January 2012, Tumblr has 39.5 million blogs--and that's just blogs; not posts--that's a lot of mullah.
And, for those who are on the crafty side, you get to make a fun little customizable sticker, to boot.
Watch out, Facebook. Your big old bad IPO self is getting called out by the new kid on the block!