Hi all,
Just a quick bit of info because I didn't know about it - not sure if it's a widely known thing or not (on the search it's briefly mentioned by 1 user only).
When using the McDonalds Monopoly app, you can click the big red chest in the centre to get more prizes. I always thought it was just decorative but I was tapping around accidentally and it triggered a Community Chest minigame.
Hopefully this helps someone.
'For every five properties added to your stash you get to unlock the chest.'