I provide the real first-hand experience from a person who is working online for more than 10 years.
I saw your trainings (without them I couldn’t even delete a text in the Editor window) but when after 2 hours of editing it didn’t save my work, frankly speaking, I was not in the mood to look for support forums and spend another XX? hours.
I prefer plugins that save my work without support forums.
In conclusion: your plugin makes it very hard to create and customize a simple popup and second I don’t like to be treated as a cash guinea pig.