I wonder who would read such an announcement. Those blog posts do not appear anywhere for long. They rush by in the feed and are gone.
If you have a project, you can make an attached blog post. Commonly known as a devlog. Those are attached to your project and there is links to that on your project page.
Anyway, there is a lot of spammed links to malware. I did not mean advertisements or promotion. I guess they increased sensitivity for that blog filter too.