It's not the $6+ or the service as much as it is my existing bread preferences. Like if all they did was offer Firebrand bread you couldn't pay me to buy that or spend my time even looking at the service, whereas I would pay $15 for a loaf of Tartine delivered within a couple hours in a heartbeat.
Maybe it's because I have such a high standard for bread at my table (my roommate is a foodie too and I can go to Thorough Bread & Pastry, Bi-Rite Market, or Tartine in 10 minutes... or I can bake my own sour sourdough in 30) but knowing where the bread comes from interests me more than what varieties are offered or how convenient the service is.
But I say this as someone that just baked a loaf of beer+cheddar+mustard bread and I smell like pure deliciousness that you can't buy from a delivery service, so maybe the service isn't for me.