On a technical standpoint, couldn't every bus after your "contactless cap" on operators that support it be counted as free, as you are only actually paying for the first two or three journeys as seperate singles and then not charged for any subsequent journey?
Surely the London hopper fare could be counted even more so, as you aren't even capping out to a point that could be somewhat counted as a day ticket, you're just straight up getting a journey on the house after paying for the first one, a bit like a buy-one-get-one-free deal in a shop.