You can open one Daily Free Case a day from each tier you have unlocked. They cost no balance to open, and what you unbox is a real skin that lands in your inventory like any other drop.
Tiers are not open to brand-new accounts. Each one unlocks at an account level, and each also carries a deposit requirement measured over a rolling window — which means a tier can lock again later if you stop meeting it. The page itself shows exactly what each case still needs rather than making you find out by clicking. Higher tiers hold better skins.
The rolls use the same provably fair system as paid opens, so a Daily Free Case is verifiable in exactly the same way as any other.
Every roll on DuckSkins is provably fair and independently verifiable, items can be withdrawn as real CS2 skins to Steam, and support is on hand 24/7. It's built for players who love the thrill of opening a case and watching their collection grow.