They're just going to do a classical boil-the-frog operation:
- Step 1: Make it opt-in and present it as the new cool thing.
- Step 2: Make it opt-out, and if the users opts out, show a scary warning about how the cool thing won't work anymore.
- Step 3: Silently opt-in, and hide the opt-out option deeply in a settings menu.
- Step 4: Silently opt-in, remove opt-out, but it still works with a registry hack. Microsoft apologists will still thinks it's cool because "just use this simple registry hack bro".
- Step 5: Remove opt-out alltogether, and silently opt-in everyone who had previously opted out.
- Step 6: Enjoy their boiled frog!
I think it's supposed to evoke an image of an animal getting trapped in a tarpit.
IIRC, originally it was adding a delay on SMTP connections to keep spammers busy.
https://verifalia.com/help/email-validations/what-is-smtp-tarpitting