Abbreviated public subscriber counts are gradually rolling out starting next week. We heard a lot of feedback from the community following our announcement in May – we’ve updated our original post with more info here → https://yt.be/help/LF4J
There's tons of complaints about your site. I don't know if I've ever heard detailed subcounts being one of them. Seems like a strange arbitrary change out of nowhere. Like an airline changing out the seat covers after a planecrash.