In 2017, Andrew Parker launched Papa with a 1-800 number, offering 'grandkids-on-demand' in Miami. By 2021, the company was valued at $1.4bn (backed by SoftBank and Tiger Global).
This is a YC-backed gig economy company operating in the regulated elder care market at unicorn scale.
On paper it shouldn't have worked -- and yet it did.
Links
Papa: https://www.papa.com/
Dr Mustafa Sultan: https://www.musty.io