I just received another email about expiration emails will end. The email includes a link to opt in to other emails at Sign up for emails - Let's Encrypt
I think that page is very strange. I can check five different boxes for things to subscribe to, with titles that are more or less cryptic. No description of what I will receive, no indication of how many emails I would get if I subscribed, no examples of what kind of content I am about to subscribe to.
So far I have not dared to put my email address into that page, and i have no idea if I will be missing out of anything, or if I will already get the information from here. Subscribing to this community forum has been a much better experience for me, since when I subscribe to a category, I can see what has previously been posted to that category and get an idea of what I am subscribing to.
I hope you can use any of this if you want to improve that signup page. Anyway, thanks for a great service.