They do address this in the doc, Orgs can now (although it was vague as to whether it was an option or just the new standard, probably option due to business contracts) 'pool' the Usage billing across all users.
I'm guessing they did that (and the 'temporary bonus credits') to make the pill easier to swallow for that side of customers.
I'm guessing they did that (and the 'temporary bonus credits') to make the pill easier to swallow for that side of customers.