This can only be done by new accounts:
TUTORIAL:
01) First they have to go to 'HOME'
02) Click on settings (⚙)
03) Then they give me my code #abc7f78f orsatyrwhere it says "ENTER YOUR REFERRER" and confirm a cell phone number.
04) Once you do that, you earn 500 coins (like me) and you can buy 3000 votes with that.