There is no reward to sign up or to refer. Steady offers "Boosters" where they will pay you real money for signing up to various programs via their link.
Referrals get $0.5 when they sign up. You earn 5% of their earnings for life. Post jobs or complete job tasks and get paid. Refer friends to your down line to get 5% of their referral earnings/deposits. Minimum withdrawal is $10, and they have multiple payout methods including PayPal. This is Available in most countries if not all.
In most regions, the referring driver is eligible for a bonus when they refer another driver to drive with Lyft. The referred applicant is generally eligible for Guaranteed Earnings (not a bonus) unless otherwise specified.