On Australian Pay TV (i'm with Austar) there's been an ad running showing clips of the animated Overwatch character episodes advertising that you can play Overwatch for free for a limited time (i don't recall the period but it's this month) and at the end of the ad showing the PS4 and X-Box One games.
Now i can't really see Electronics Boutique (EB), Target, Big W, KMart, JB Hifi and any other small retailer banding together to give out free copies of the games and from my understanding the only thing you pay in-game is currency to buy skins, poses and voices.
So how is it you play Overwatch for free for a limited time?