I just saw those ips opting in:
66.249.93.53 (opted in 2 times within 3 minutes)
64.233.172.246
You can look those ips up, they come from Google.
So looks like Google ips bypass your filtering system.
My filters are set to block everything.
They are google data saver IP’s read more here:
https://support.google.com/chrome/answer/2392284?co=GENIE.Platform%3DAndroid&hl=en
Cheers