Several People I know have gotten 5 or 10 dollar "gift vouchers" from sony recently. They have all redeemed and spent them without any issue. They received the message in their SEN inbox on the XMB of their PS3's. I've asked sony, via email, to verify if the gifts are legit or not but have yet to receive an answer. However the people I know that used it haven't had any problems.
So no one know who is getting it exactly? Guessing it's all random? I've yet to receive mine. I'll wait....
*waits in the corner*
(´･_･`) *twiddles thumbs*
EDIT: Hey everyone - please feel free to join this conversation - http://community.us.playstation.com/t5/PlayStation