-In earlier days on Subeta, there were plushies that could grant pet slots, and other things back in Subeta's past that could as well. This is no longer the case, which accounts for the "pet slot plushies and early totems" slots line.

-One of the loyalty box options is a loyalty pet slot totem, which is the "pet slot loyalty totems" line.

-New slot additions is for the 2000 CSC ones that you can purchase from the Pets page

-Pet slots can be purchased directly from the Millionaire Center with sP. There's a "Pet Slots" tab in there for these slots.

-Pet slots can be awarded as part of sitewide events such as (but not limited to) quest-a-thons, and those are the awards and prizes ones.