I think my post:day ratio has probably fallen quite a bit in the last couple of months, but that's just an ebb/flow thing for me I think. Perhaps since becoming a modster I've paused more often to consider the value of the post I'm about to make. Honestly not sure on that.
Tristan and Jaq are probably two people that most people would think of, when you say "high post count", but they are anything but spammers IMO. The frequency of posts is not what makes a spammer a spammer, it's the value (or lack there) of the content that determines whether a post is spam or not. I see both Tristan and Jaq as frequent and valued contributors to this forum, almost invariably with something to say that's genuinely worth reading. That's not to say that they're incapable of banter.. they're both great at it, and I enjoy reading flighty banter as much as I like reading a good book, especially at the end of the day.
The people that I think of as spammers generally have post counts in the low hundreds rather than thousands.. and the reason I think of them as spammers is because of WHAT they say, rather than how prolific they are.