I don't see how they can really stop cheaters until they do something like force businesses to post a unique verification code inside their store (or print on t

I don't see how they can really stop cheaters until they do something like force businesses to post a unique verification code inside their store (or print on the receipt) that changes every day, and require that code to get any rewards. With the way it's set up now, can't I just use my computer to send whatever HTTP request my iPhone sends, but with bogus coordinates?