In the case of GitHub, I'm (still) okay with it though, since most of the data I reveal on there is public anyways (code, organization membership, stars, ...) and the benefits (for me at least) outweigh the problem that I'm giving personal data to Microsoft.
But yeah, I rarely hear people talk about privacy on GitHub even though we should pay attention to it.
I used to love the old 'explore' page. It had a feeling of going on an adventure, digging into a dark cave of unfinished projects and people's brains.
Or, recognize a bit better each project. For instance, the LICENSE is automatically read. Why no read the "Keywords" in `package.json`, or the `<meta>` in `index.html` for the Pages projects, etc.