I was fortunate to find Shortburst Sports in its infancy and have watched it grow, and improve, rapidly. Outside of the opportunity to compete and win real prizes, a feature that I love is that you can make your picks quick and easy (especially now with the mobile app). OR you can take your time to really make an educated decision on each and every scenario. Point being, since it's free, there's no reason why you shouldn't partake in every challenge, no matter how much free time you have in the day.
Won a t-shirt and an EPL scarf from Shortburst! These guys are awesome, quick shipping, very personal, and always have great prizes! Definitely going to keep playing every day!