The event doesn't until the 14th considering this event was splashed across the internet on multiple giveaway sites Facebook etc. The chances of being selected a winner are pretty slim.
From the event page
4)We will choose 1000 winners at random and notify them by email before August 17th. We’ll ask the winners to send us a picture of their old charging cable, and get a free PowerLine.
Update 8/13* actually I just noticed as of the 13th there has only been around 1.5k entries so get your get your hopes up
Update to the update 8/15 as @joshuad11 pointed out the 1.5k number only applies to the community entrys who knows how many people entered via Facebook or other places, sorry if I got anyone's hopes up and good luck