This is a hybrid of an Operating Account and an Endowment. It functions as an operating account but is invested in the endowment pool.
Quid Pro Quo Contribution
This is a payment a donor makes to a charity partly as a contribution and partly for goods or services. For example, if a donor gives the Foundation $100 and receives an event ticket valued at $40, the donor has made a quid pro quo contribution. Only $60 is considered a gift for tax purposes.