Most people won’t hit a hard cap with this unless they tap out on time, inventory, or marketing skill. The ceiling is basically tied to how well you pick products, manage margins, and scale your traffic.
Some creators stay stuck at a few hundred a month because they never test new items or optimize ads, while others push it into five-figure months once they lock in a winning product and system. It’s not unlimited, but the limit is usually the operator, not the model, and you can scale pretty far before you realistically max out.