10000 thousand people a day hear about any given topic for the first time in their life https://xkcd.com/1053/
If one goes to the release notes for Lazarus, they either sought those release notes out, and hence already know what it is. Or they were linked to it in a specific context, such as Hacker News, which the expectation of curiously clicking around to understand the project is natural.
It doesn't mean that I will actively try and navigate out of a forum completely separated [1] from the actual product site just to see what it is.
[1] It's the bane of nearly all projects, both commercial and open-source: blogs, release notes, discussions, forums and often even documentation don't have a single link back to the product page