5 instances per hour in Classic, abusable?

Currently the Instance limit we have on classic is 5 dungeons per hour PER character. Is this not supposed to be account wide?This was added around a week after 1.7 Launch as seen from this archived link - https://ift.tt/2mrraFn does not specifify if the instance limit is per character or per account, but im sure you can see where this is going. With Dire Maul right around the corner (Blizzard Time™) the famous dungeon farm really ramps up, especially so with layer removal.I am talking about Lasher and to some extent tribute farming, one is safer to bet on than the other, Tribute if it works is in the ballpark of around 100 gph, while lasher farming is around 50-60 gold per hour allegedly (This depends highly on if private server drop rates were remotely correct or not, as this is a figure that is a lot harder to estimate since its not set drop tables)However, this also extends to when Zul'Gurub comes out with crocodile packs. Bijou farming is insanely profitable for a while after ZG launch, basically exclusive to mages, and if you can just rotate mages on your account to keep farming the packs, you can effectively avoid the cap entirely.Dungeon Resetting while offline to teleport to start is another thing that "speeds up" this type of farming, making this line of thought more optimal as well.Anyone got any info if this is how its supposed to work or if it's an oversight? I found some old wowhead forums about people not being able to enter Vault of Archavon after rushing BRD on some alt but that hardly counts as evidence.