The other local equivalent is the PhillyPass, a limited-time pass that gets tourists into many museums, but that doesn't engender the sustained engagement I think we're hoping for here. Hive account@chelseareed's invocation of Patreon is probably a better model, and could be seen as a democratized version of the fundraising work that museums already do, receiving small donations from many investors/patrons rather than just a few rich folks.