Additional clarification:
No one lost a verification badge today–If you received an email that your channel will no longer be verified, this was just an advanced notice & you can appeal
The checkmark has never appeared on YouTube mobile channel pages (this will be added soon)https://twitter.com/TeamYouTube/status/1174735005215420416 …
I think what they are doing here is trimming off everyone who doesnt respond. If we can assume that the appeals will reverify, then everyone who doesnt appeal will lose it and they are either dead, too busy, or left the platform and they want that checkmark gone.