For stuff like antibiotics where it is less possible to schedule in advance, there isn't much margin on $5 prescriptions. Which doesn't mean that there aren't people that will pay $10 extra to have their stuff delivered, it just means that there aren't lots of people clamoring for it.
Also highly recommend following Mark Suster.
What type of content have you seen from Mark?
: Snapchat 101 for VCs and Old Folks https://bothsidesofthetable.com/snapchat-101-for-vcs-and-old...
With his experience & role at YC, I think Justin is in a unique position to share a glimpse at companies changing the future more than almost anyone else. Also I think it's cool how he responds to questions from followers.