We want to run a contest where 10 people from our segment will win free passes to our user conference. It's Easter Bunny themed so they have to click on the Easter Egg to see if they win. So what we were thinking is when they click, they would either go to a "Sorry, you didn't win" page with a code for a discount on our conference or they would go to a "You Win" page with a unique code they could redeem for a free pass.
We have the unique code part figured out but how can I randomly determine who the 10 winners are?