Facebook has been testing the "Pay to promote" feature on "Pages" for some time now, this feature has now been rolled out to some personal accounts as well.

As you can see in the images posted below Facebook prompted me to promote an "birthday wish" personal message by paying for it, paying to promote an post results in higher placement of item in newspost ensuring greater visibility. It seems facebook has now started to "LIKE" your wallets, hope they do not push the envelope too far.