You didn't read that wrong; it's EVERY 5th check-in, meaning you can get a free ticket at 5, 10, 15, etc, check-ins. Between my girlfriend and I, we've already collected 4 tickets.
If your parents are mall-walkers (like mine), have them check-in for you as they do their exercise laps around the mall. I spoke with the concierge and she said that one mall-walker already has enough free tickets to see a movie every weekend for the rest of the summer.
The "Darkside" tip: Due to some glitch with FourSquare, once you've checked-in for the first time at the mall, your future check-ins can be made from home. Rack up those check-ins at home, but don't check in for the 5th time until you're actually at the mall! Once the "free movie ticket" coupon pops up, don't touch your phone! If you navigate away from the "free ticket" coupon, it will lock, and you'll have to check-in another 5 times before it unlocks. They will only give you a free ticket if you show them the unlocked coupon. The mall concierge will write down your name and the date when you claim your free movie ticket, so please space out your free-ticket-grabbing trips accordingly. Some kid showed up with 36 check-ins after only 2 days and is now banned from getting free tickets. Don't be that kid.
Enjoy!
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