well using your 4kb generaliztion, with appx 2450 accounts (49 pages, 50 per page), 9800 kb. Ill even make the generous assumption that 450 are active (to make the numbers incredibly easy), thats 8000 kb, 8mb. I don't know how much it costs for hosting in England, so I couldnt give you an estimate on cost, but still, it seems like some accounts could easily be gotten rid of, since it is incredibly easy to make a new one if needed.
Oh and was Desu right?