This post is still being written — please check back later. Posted: May 2026.
I built the #1 ChatGPT plugin that lets you ask questions about any PDF you upload -- this was made before you could just upload a PDF to ChatGPT which is why it was so popular. To monetize I prompt-injected across the various plugins I made with Stripe links (that conveniently rendered as markdown) to use the users context to try and sell them why they should pay for the plugin.