You've had enough arguments with people in both this thread and the previous that I'm pretty sure you understand what the issue is with your use of the word "free".

What you are offering is NOT a free tool -- it is a demo, for a tool for which you are charging $12/month. No reasonable person would interpret a grand total of 3 exports as enough to justify calling this a "free" tool.

This is to say nothing of your violation of AGPL on the use of MuPDF, which has been pointed out here and elsewhere.

But of course, you're free to Show HN a paid product; just kindly don't insult our collective intelligences in the process.

Imagine a pizza place that allows you to pick from 40+ toppings but you can only order a margherita ;) /s