Having a zero Easter Egg policy is simply the only thing that makes sense, because there's no guarantee that something slipped in by an individual employee who thinks it's funny or tasteful... is actually funny or tasteful.
As an indie dev, if users trust my taste enough to use my software, then I can follow my taste as well when it comes to Easter eggs.
And it’s why most attempts to do cutesy Easter egg style things by bigger companies tend to just sound lame and fall flat.