Most of our users aren't active on these social media platforms and don't receive news about GrapheneOS beyond our release notes. Hundreds of thousands of people use it as a daily driver without closely following the project. We plan to reduce our dependence on these platforms.
We'll be extending our Info app with a News section. It can have configurable categories so people only see the parts which interest them. We could also use the Info app to provide a way for people to volunteer to help us with categories of tasks and receive alerts about those.

@GrapheneOS That would be great. Especially the receiving alerts for specific categories part. Separate RSS feeds or mailing lists for each category would also be nice.

I'd like to get notifications about interesting announcements but not about every new release.