Also worth pointing out there is a cap on the number of votes you can make (maximum 20), and a time limit of 10 - 15 minutes during which you're able to vote. So no one can vote without paying, but they can't spend more than $8 USD on votes either. (In Australia, a vote costs 55c, about 40c US.)

Of course there's people who can try buying SIM cards & running bots, but in theory that's what the PwC vote auditing and Digame's systems are meant to detect & block.