The June to July plunge in interest paid?
HF25 was activated on June 30. It changed the interest payment for HBD held in savings only.
As exchanges do not store their HBD in savings, this has actually saved the platform a lot of money by no longer paying interest on their customer's tokens that they hold.
Thanks for the info @arcange that makes much more sense now. I wonder if people moved their hbd back to their own wallets to put into savings? Pointless leaving it on exchanges apart from the inherent risks. 👍