I underrated it because while most other plugin creators allow their users to input custom css code and easily customize the look and feel of their installation, you have put efforts into obfuscating the code and making it hard for the average user to override your CSS and scripts.
I think it's a bad decision that hurts your plugin much more than my rating does. And no, I don't think developers should starve. However, charging people for border-radius seems wrong and against WP basic concepts. But I don't expect you to know what WP stands for, how it all started and why it got where it is now. You wouldn't be asking money for adding border-radius to open source libraries if you did.