Games with gold question

Yes. Even though it was free it will still show in your download history as a previous purchase so you can redownload it again for free later.

To settle your doubts it will be better if you contact xbox chat support billing section:

support.xbox.com/.../contact-us

or if you are part of the USA/CA region you can contact this free toll nr: (800) 469-9269

You have made this post on October 1 when "Mirror's Edge" was available as free game with gold from September 16 to September 30. Anyway as always you will receive a message in the email address connected to your xbox live account about your purchase.

Or you can check your xbox one purchases as shown here:
support.xbox.com/.../check-xbox-live-bill

Nice, thank you. After I get the One I probably wont have a lot to buy some games so it will be very nice to have a library of games from GWG to play. Good guy Microsoft.

Since this is not a Rewards program issue, this is the wrong forum, but Games with Gold games are free to download for a certain amount of time, but once you've downloaded them you can continue to play them at any time. Xbox One gold games do require you
keep a gold subscription in order to play them, but you're not restricted to only playing them during a certain timeframe.