An image of a new Xbox One feature has been posted on Reddit which appears to show a new Xbox Live Gold subscriber program that offers games for a free 24-hour period, so the image would suggest.
One of last month's free Games with Gold for Xbox One, Max: The Curse of Brotherhood, is shown in the image below, with the words 'Free Play Day with Gold' under it. It also sits beside this month's free games, Strike Suit Zero: Director's Cut, and Crimson Dragon.
@PrestoFriend531 Gotcha. Looks like it is actually. We'll be in touch here shortly. :) ^AD— Xbox Support (1-5) (@XboxSupport) August 20, 2014