open money is open
abundantly diverse in variety, by form, and so by function
it can be issued for long-term and short term uses, local and regional, special and general purposes, public or private.
specifically framed (for internal use by a particular club or team or business church)
or more loosely (fans of a band …)
big or small / fast or slow
communities develop their own set of open money systems to match the variety of their needs and values in their context