Heads up: conversion to premium / auto-assign slots
When you say "accounts that do not have any additional purchased slots" do you mean accounts that would only get the base 2 global unlocks, and that those are being auto-assigned to servers?
Or do you mean accounts that never purchased slots, but gained slots through Going Rogue and veteran rewards?
Here's a nice little bug for players thinking about converting from VIP to Premium.
The conversion system likes to go ahead and auto-assign your global slots to servers, regardless of whether or not you actually have previously purchased slots on those servers.
In addition, NCSoft support is declining to move those system-assigned slots back into Global-slot unlock so you can place your purchased slots where you want them.
I've verified this auto-assignment behavior also occurs on accounts that do not have any additional purchased slots, at all.
So hey, if you go from VIP to Premium, be prepared to have a lot less global slots than /mypurchases says you will have.