I was recently offered a sale price by a restaurant on Doordash, when I was logged out. I logged in as a subscriber and the sale deal went away, which meant that the delivery actually cost slightly more. I've noticed this pattern a lot: the subscription supposedly offers savings, but when you A/B test the same meal against a subscribed/logged in account and a non-subscribed account, the amounts are usually very similar.

My conclusion is that Doordash actually cares more about their non-subscribed users than their subscribers: that's where they see growth.