Facebook had multiple approaches to keep users seeing ads (ie your message) on their site despite ad blockers. Could you mix a message amongst some content mixed up with some elements? Hopefully would not affect rankings too much, but could at least reach users. https://www.bbc.co.uk/news/technology-46508234.amp

Base64 encoding images with watermarks may also be worth a shout.

Love the zip bombing.

Long shot but I wonder if its possible to execute some script on their server.