I think the idea is that it's a separate flags repo?
I’m not sure I have a comprehensive solution. I just know which ones I hate more than which others. The repo is the least obnoxious of the options.
So instead of controlling flags from a website, you get the benefits of git merge, PR's, reviews, documentation etc without having to rebuild it.
I like the concept since it brings accountability. But it's just a need that larger orgs have, but by that point have likely internally built a flag system and so transitioning is difficult.