About this offer
The standard public no-purchase signup at Zonko grants 3,000 Gold Coins, credited immediately on registration. No promo code changes that figure.
The real headline is the first-purchase offer: a $20 minimum coin package purchase triggers 112,000 GC and 65 SC total, split between 40 SC credited instantly plus a spin of the Welcome Wheel, and an additional 25 SC distributed through an 8-day "Power Boost" that starts the day after purchase.
The Power Boost schedule escalates daily, from 3,000 GC + 1 SC on day one up to 10,000 GC + 6 SC on day eight, so the full amount only lands if you log in every day for a week. It's a one-time offer restricted to new players and the first purchase only.
Sweepstakes casinos do not issue promo codes. This offer is attached to the link above, so following it is the only step.