There's a new banner shown on some of the technology Stack Exchange sites:
Meet The Overflow, a newsletter by developers, for developers. Fascinating questions, illuminating answers, and entertaining links from around the web. Learn more
Every podcast episode now seems to be similarly advertised:
Podcast Episode #126: We chat GitHub Actions, fake boyfriends apps, and the dangers of Legacy code. Listen now.
When I dismiss these banners on e.g. Stack Overflow, I expect them to disappear from other sites as well. But that doesn't happen.
I regularly visit a lot of sites in the network, a permanent solution would be most welcome.