Im not a lawyer so take this with a grain of salt but Im pretty sure if in the contest rules it states "winners will be announced on (date) on this site" then not only are you obligated to post the names of the winners, but you could face some type of fines for not doing so. Also in the response "Dont think its appropriate to post the winners names here" that also doesnt apply because in the rules on the first post of this thread under conditions it clearly states that the by entering you are agreeing to allow Wise Guide to use your name as they see fit in connection with this contest.
So all in all I think this was a flat out scam, there never was a $1,500 gift card. Not sure what they thought they would gain out of it other then filling our spam boxes with crap emails but I feel the mods should ban Wise guide from the site. JMHO