> ## Documentation Index > Fetch the complete documentation index at: https://docs.supercycle.com/llms.txt > Use this file to discover all available pages before exploring further. # Methods > Circular commerce is charging for the same item multiple times, we support various models. Circular at it's core charging for *usage and access* to an item, rather than *ownership*. This can be modelled in many ways, we currently support calendar, membership, subscription and resale. You can run any combination of methods at the same time and each product can have different methods enabled. Fixed dates between X and Y. A recurring fee until the item is returned. Swapping products within an allowance, like a library. Selling a serialized item, often from used or refurbished.