I think there might be more to this story. This app is what people generally use to sideload apps on a locked Google TV device such as the Google Chromecast. One such commonly sideloaded app is SmartTube, an unofficial YouTube client with no ads and SponsorBlock included:
https://smartyoutubetv.github.io/
I'm not surprised Google is eager to take it down under any pretext, and not so eager to restore it.