No. Proprietary and open source developers will not need to pay subscription fees. Everyone who wants access to the source code will need to subscribe to OpenVPMS but developers subscriptions will be at no cost. We believe this is necessary to grow the developer network and encourage the delivery of new applications into the market. Our only stipulation is if a Veterinary Practice utilises an application based on the OpenVPMS open source software that they are a current subscriber. I.e. the onus is on the user of the application to adhere to the license conditions.