I run a small, extremely niche fan site with under 500 users, and I received a very similar email the other day - someone complaining about the "cookie popup" (which my site doesn't have), and then sending me a "screenshot" in a sites.google.com link when I told them I don't know what they're talking about.

Only difference is that it downloaded a .zip file containing a shortcut (.lnk) file which contained commands to download and execute the malicious code.