There are other options besides lurker.
For that matter, we can create one that is called essentially anything we want but I myself do not know how to assign them based on whatever parameters (post count, likes or whatever) except on an individual basis. Like, example I could put your account with a super cool dude banner, but I don't know how to do that in a blanket statement for all old timers that have been members here for years.
Far as I know, zenforo is supposed to be looking into it. All of that is not stuff that I normally fool with. I would expect that they could fix that back in knowing that the posts counts are still logged, just not showing like they used to be.
Most of what I do is go through new account/registers to keep out spam accounts (and there are about as many spam accounts that registers as actual members and real people trying to sign up) so I tend to go through that every single day of the week. That consists of looking at the username, the IP location of where in the world their provider is, seeing if it's a dynamic spoofed vpn address, or something just doesn't look right about it, etc.
I'll also fix stuff for when people register and mispell their username and reset passwords and such.
But, I myself don't get too deep into the behind the scenes technical stuff. I'll be the first to admit that I don't know much about any of that.
While I'd love to be able to answer everyones questions about that, I'll have to defer to those with the keys to the door and pay the bills to handle that.