Community Cases are built by other players rather than by DuckSkins. Someone picks the skins, the case gets a price, and anyone can open it — with the same full contents and listed drop chance for every item that a standard case shows, on the case page, before you open.
You can build one yourself. The themes tend to be narrower and stranger than the standard catalogue: one weapon, one collection, one colour, one running joke. The rolls are provably fair and verifiable exactly like any other case on the site.
Every roll on DuckSkins is provably fair and independently verifiable, items can be withdrawn as real CS2 skins to Steam, and support is on hand 24/7.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.