I don't see what you could do about "people browse the site but don't check out." I'm sure that is normal for any website regardless.

In this case, wouldn’t you see a lot of abandoned carts coming from the reverse proxy sessions?

	▲	StilesCrisis 6 hours ago \| parent [-]
		I don't know the scale of cart-abandonment for a website like Jimmy John's, but it has got to be large enough that a few dozen more wouldn't be _too_ surprising.