[yeukhon]

You quoted it: "primarily", which means GitHub (in this case) does not prohibit users from using Page in the way you seem to disagree with. What you choose to do with Page, a blog, or a personal static website, is at the mercy and the discretion of the service provider. You just can't advertise products using Page.

You can call your project "my 365 days of kernel hacking series", put the code on Github, and then host a blog on GitHub with a mix of hacking blog posts and other non-hacking blog posts. That's acceptable.