Each user can earn $ZIL buy using a referral program, even if he or she has zero balance. The entrypoint for participating is "Referral program" button on main page:

After it you will be able to see a page, on which your personal link will be displayed. You can copy this link yourself or send it using share button.

Copy this link and send it to anyone you wish. If someone will register on the bot using your link - you will get 10 $ZIL and 100 points bonus for that. The one who registered will also get 5 $ZIL bonus.