The Coins are virtual only
Coins in Quick Hit Slots are the only currency, and they're virtual. You bet Coins on the reels, you win Coins back on the wins, and the loop continues. There's no cash equivalent, no Loyalty Point program that converts to comps, no PayPal or bank account to link, no Sweeps Coin layer. The app is gambling-themed entertainment, not gambling, and US and EU law treat it that way.
Why the machines look identical to Vegas floor slots
Because they are identical. The Quick Hit family is a Bally Technologies product that's been on real Vegas casino floors since the early 2010s. Light & Wonder (formerly Scientific Games) owns Bally, so the social casino app uses the exact same machine art, reel symbols, paytables, bonus features, and sound effects as the physical versions in MGM, Caesars, Boyd, and Penn properties. The only difference is the social app uses virtual Coins and the physical machines use cash.
Why the in-app purchases aren't a workaround
Quick Hit Slots sells Coin packs ranging from about $1.99 to $99.99. Those purchases give you more Coins to play with, but the Coins themselves still have no cash value. Buying Coins is one-way: there's no path back from Coins to real money. The packs are for players who want to skip the grind, not a gambling deposit.
If you want real money slots: separate apps, separate licenses
If real money slot play is what you're after, you need a separately licensed real money casino app, and what's legal depends entirely on where you live. In the US, only a handful of states (New Jersey, Pennsylvania, Michigan, West Virginia, Connecticut) allow real money online casino. Even there, Quick Hit Slots itself is not a real money product. Some of the same Bally Quick Hit machines do show up on Light & Wonder's real money B2B platform that operators like BetMGM, FanDuel Casino, and Caesars Palace Online use, but those are separate apps under separate gambling licenses with KYC and age verification.
How to get real value out of the free version
The free version is for the slot machine entertainment itself. The play here is to treat Coins as gameplay, not as money: stack the free Coin sources (hourly bonus, daily login, Facebook page links, Community group, friend gifts, collection rewards) so you don't spend real money on Coin packs, and enjoy the actual Bally Quick Hit reel art and bonus features without the cash risk. Morning Reward collects every official Coin link in one feed so you don't need to monitor two Facebook sources to keep your Coin stack alive.