Thanks for raising this on Dec 10. At that time, the script was only 3 days old and had quickly reached 318 installs with 12 votes, which I understand looked unusual.

As TsukiAkari already explained in the comments, it spread rapidly in some large non-English speaking communities where users have been extremely frustrated with YouTube's autoplay previews and channel trailers for years. The timing was perfect, and word-of-mouth in those focused groups made it go viral right from the start - completely organic.

Since then, growth has been steady and normal. It's now at over 3100 installs and 20 votes, with recent updates and no more sudden spikes.

I'm closing this issue as the growth has proven to be genuine and organic. If anything new comes up, feel free to open a new one!