I've definitely seen games where the character you play is all that matters with your post. An obscure character is going to take a lot more effort to get a lot of tags to their post than the flavor of the month character will. The characters from popular canons will get loads of tags without even trying and on a stupid "Where am I?" intro made the same day as a bunch of other intros.

That's just the way RP is. Plenty of idiots won't tag characters if they don't know the canon, the character isn't the same medium, isn't played by one of their butt buddies, etc.