Which exchanges are supporting it?
I think at the moment two exchanges are supporting the Bitcoin Interest Fork - one is HitBTC and the other is Okex. I am not % 100 sure, if I am wrong please correct my mistake.
That's true and correct because I follow this project and I read their announcements about the two trading sites which will support this bitcoin interest. This will be the third fork to be happen this jan. 22 so I hope after this fork we can see some major changes in terms of their transactions and fees.