message automatically attach in hotmail

Hi there,

I just discovered that when I send out an email using hotmail at the bottom of the message (under my signiture) there is the following message:

Share your opinion and enter to win! Please complete this survey to enter into a draw for a grand prize of $500 or one of twenty $50 cash prizes.

Has anyone else experience this?  Is this a virus or a slick way hotmail came up with to advertise.  Any information would be appreciated.

Thanks,

RCorr