There are a lot of promotions, specials and incentives out there today and you have to be careful!
Some end up flooding you inbox with spam or roping you into taking surveys that can take up and hour of your time! The promotions or raffles I believe are the safest are Face Book promotions or contests for just "liking" a page.
Boynton Pro Audio is offering a chance to win a free Shure SM58 for just "liking"their FB page, which you can always unlike down the road if you don't like them, so now worries! The video below explains what to do. Ck it out!