Yes, indeed. I didn't know this site until I launched mine, but it seems to me they're just listing all of the popular open source projects.
I've tried to mostly curate the projects that are actively maintained, and have some sort of hosted, paid alternative. This gives you more confidence, that the app will be maintained as they're making money out of it.
You consider it a good sign that the project is charging money for its use. Others consider that a sign that it's going to become increasingly customer hostile on a short enough timeframe that you don't want to go anywhere near it.
It looks like this page is further along indeed. First mistake I see on this page is that Home Assistant is called "Core" which is just the name of the core repo.
The thing both projects do that I don't think is useful is state that the project is open source in each description and push out the actual description of what the project does.
In general if I'm looking for open source alternatives I'm mostly interested in projects that are well maintained and are big enough to stay that way. If there is a website that is able to somewhat make this distinction it can have real value.
That's what I was trying to achieve. You can find information like latest commit date which can indicate that the projects is actively maintained. Plus, I picked mostly hosted, freemium applications which have incentives to keep the software up to date and maintained.
As pre your comment about descriptions, I took them directly from the repositories where most of them brag about being "open source". That could be a good idea to modify that to me more informative.
I've tried to mostly curate the projects that are actively maintained, and have some sort of hosted, paid alternative. This gives you more confidence, that the app will be maintained as they're making money out of it.