There seems to be some major cleansing going on in Chrome Web Store. At least 7,500 extensions got removed over the course of the past month. Judging by the extension names most of these don’t appear spammy, and often enough they only had a handful of users. I cannot see a connection to Manifest V3 migration either – plenty of those were already using Manifest V3.
For comparison: in the month before that I could see roughly 600 extensions being removed, and here it’s lots of extension names typical for spam submissions.
Edit: Most of the extensions seem to have been removed in the past two days, often Chrome-Stats isn’t even aware of the removal yet. And Chrome-Stats shows the extensions count drop by more than 4,000 between yesterday and today.