I've been on the Prize Reactor site for a few weeks so far and I've been really impressed with the amount of prizes to choose from. I've not won anything yet but I can see there are new winners each week and the website is all run by a company that seems legit from what I can see. I'm not sure where the $5p/w figure's come from on the other comment as I've never seen any mention of having to pay since signing up. I'll keep entering offers and wait my turn to win something! :)
Prize reactor are a robot based promotions company with promises of prizes you can't win unless you subscribe for $5p/w and good luck trying to get out. Lucky I never got sucked in to this one but others obviously have wasted their time. Coles, Wooliesand Aldi are to blame as they are the ones offering prizes. Bad.
PrizeReactor is a scam, it will take you to a site that is not secured, http: instead of https:. Its being blocked automatically by my malware. It will sell your information to another companies that run other scam. BEWARE.