Paid Memberships Pro Variable Pricing Addon GPL Overview:
Variable Pricing Allow customers to set their own price when checking out for your membership levels.
How it Works
The Variable Pricing Add-On is a plugin for “donation-type” sites, where you give members the ability to give more or less than the recommended amount. This model is sometimes referred to as “pay what you want” or “pay what you can” pricing.
When a user completes membership checkout on your site, they will have the option to adjust the price via a text input field.
The price they select or enter will override the initial payment (amount collected at checkout) and any recurring billing amount for the level (i.e. if your suggested price is $10/month and the user enters “$15”, they will be billed $15/month ongoing).