I would add that subscriptions are gaining traction in the delivery sector too, which is getting more and more important for the good health of omnichannel strategies. They're very dangerous, though, especially for those logistic companies eager to please. The risk is promising more that you can economically handle. I guess the same might go for the other sectors. Experience is much valued in delivery too. You can't think of it as a "behind the scenes" service no more: it's part of the shopping experience. It has to delight the customer.