I saw it too but toying with Google TM scares me. Even if they don't care about blogger keyword, sane end users usually avoid confusion with well known services.
I don't think Google has trademark on "4blogger", maybe they have on "Blogger".
I doubt you can grow that big so it would concern them.
Best use case for this domain is probably some resources for bloggers.
Not entirely sure if something has changed recently, but when DD domain expires it shows 'expired' page until the last day owner can renew.
Look at bunx com from yesterday, it still has 'expired' landing page.