Thanks for your questions! You can buy it once and use it as many times as you like. "UI" refers to a landing page and checkout form that we pre-built and inc

Thanks for your questions! You can buy it once and use it as many times as you like. "UI" refers to a landing page and checkout form that we pre-built and include with the app. We didn't do a good job of making that clear, and that's something we want to improve on the sales pages. Your question about bugfixes is an excellent one. Eventually, we'll be moving this to an engine/gem, but for now you'd have to make manual changes. This is far from ideal, so we're planning on fixing it. This is just for one time purchases. We'd like to add support for recurring billing at some point, but it's not planned for the immediate future. Thanks for your feedback on the price. As this is at MVP stage right now, everything can possibly change, including that.