Users wanted me to create a dark theme, but that's a lot of work to create and maintain themes for YouTube, and I already spend countless hours maintaining the extension, so I've searched for beautiful themes out there and found yours. Since your license allowed me to integrate your theme in my extension I did it. I wanted to inform you but I've never found a way to send you a message directly (didn't wanted to post in comments and be considered as spammer). I invite you to contact me via my website, I could share with you bug reports and fixes. I've added the "by RaitaroH" in version 2.0.43 (as per the terms of your license this was already included in the source code). Cheers.

EDIT: I ain't got time to learn how to use GitHub, this is why I suggested email. Regarding new palettes, we could add a thousand new ones it's never enough for some people like Ratzlepuff... Maybe they think developers just need to snap their fingers to provide all this free stuff and that we are at their disposal 24/7... Fortunately there are still people who post reviews because they appreciate our work, not just to report issues.