pay what you want
Pay what you want (or PWYW, also referred to as value-for-value model) is a pricing strategy where buyers pay their desired amount for a given commodity. This amount can sometimes include zero. A minimum (floor) price may be set, and/or a suggested price may be indicated as guidance for the buyer. The buyer can select an amount higher or lower than the standard price for the commodity. Many common PWYW models set the price prior to a purchase (ex ante), but some defer price-setting until after the experience of consumption (ex post) (similar to tipping). PWYW is a buyer-centered form of participatory pricing, also referred to as co-pricing (as an aspect of the co-creation of value).
pricing strategy/business model
business model pricing