>>545102751
Around 10 minutes or longer, just anything more than zero. People who play your game are worth 100 people who wishlist you and worth 1000 people liking a social media post. It's easy for people to like your game but look at it's price in the store and decide to pass on it. Demos are a way for people to play your game for free and decide they actually like it enough to buy it. This makes them infinitely more valuable than wishlists.