The text was changed in May. The current version is
Thanks for contributing to %{site_name}!
Before you post, please select a category or tag to group this topic with related discussions so that it's easy for others to find it.
For more tips and advice on participating in our community, [check out our community guidelines](%{base_path}/guidelines).
So the only available keys are site_name and base_path
The topic could benefit from an update. There have been several changes regarding education messages in recent months. Some no longer exist.