This is very straightforward: upon logging in, a banner for the store I was shopping (Acme Markets) said I have free delivery today. OK, fine. Picked out a cart totaling the minimum for free delivery, moved to checkout. Oh, surprise! Line item for "delivery" says FREE, line item for "service fee" says $2.00.
Also showed a line item for "tip" which was prefilled to $2.00, changeable if desired (which I would have set to zero - I don't "tip" until after served, when my groceries arrive unbroken/unspoiled/on time.) I am not interested in the fact that their lawyers may have advised them that a service fee can mean something different than a delivery charge.
The delivery IS the service, so I call BS on Instacart. Moral of the story (it's an old one) - if something seems too good to be true, it probably is. Oh...yes...almost forgot: most of the items listed for the store have their prices increased SIGNIFICANTLY, no doubt to cover the "free" delivery - example Entenmann's Danish Twist, 15 oz., sells in the store all day long for like $6, priced at $8+ on Instacart.
Ripoff.