You have placed yourself in the "freemium" echo chamber. Good luck with that. The very fact that you have to defend your actions under "About this extension" show that you knew you were taking a chance. Guess what? You made a bad choice. Do like other developers do. Offer a free trial with an option to buy. I have paid for many applications throughout the years such as SecureFX, UltraEdit, etc. I don't MIND paying fifty or sixty dollars once I reach the upgrade limit. Like most recurring charge pimps, you hope that people will sign up and forget or stop using and that minuscule charge will stay under the RADAR and keep enriching you. What you DON'T DO is blindside users with a sudden "B*tch! Where my money?!".

Don't cry too hard when your extension goes titz up.

Uninstalling after posting.