I was glad to hear that GitHub finally allows users to watch only the releases of a project and get notifications about those. Before I used blogtrottr to send me an email on changes to a certain release feed (e.g. https://github.com/openwrt/openwrt/releases.atom).
Unfortunately this feature doesn’t seem to work at all for me. I’m watching the releases of at least 5 projects and I haven’t recieved any kind of notification (neither mail nor GitHub notification) for several releases that have happened since then. Here are my notification settings, they seem correct to me:
Another hint might be that I currently have three mail addresses in my account. I don’t have access to one of them. However the “Default notification email” is set to my current one, which I do have access to. I also get updates regarding comments on issues and such to that mail address.