Check your Face­book pri­vacy set­tings, if you use it. Appar­ently by default Face­book allows your pro­file photo to be used by 3rd party adver­tis­ers to pro­mote ser­vices to your friends. Face­book sez, “Don’t mind us, we’re just whor­ing out your pho­tos” You can turn this off by log­ging into Face­book using Inter­net Explorer (Fire­fox will not work) and click­ing “Pri­vacy Set­tings” under the “Set­tings” drop­down in the top right cor­ner, select­ing “News Feed & Wall” set­tings, and click­ing on the “Face­book Ads” tab at the top. Update: Accord­ing to this source, phở­tos aren’t avail­able to 3rd party adver­tis­ers after all. Maybe.