How to book a COVID-19 vaccine appointment in Michigan

In late February, I read a Detroit Free Press article about a Facebook group called the Detroit Area Vaccine Hunters , and I was intrigued. I had already been booking vaccine appointments for friends and family at that point; I clicked on the group, and saw they were looking for "Vaccine Angels" to help out, so I signed up and began making appointments for strangers. Fast-forward to today, April 11th, and I have probably made 200-300+ appointments for people. I'm well-versed in most of the national websites, like CVS's and Walmart's, and what makes the "game" interesting is that every day, more and more clinics pop up; originally, we were only relying on Rite Aid in the Metro Detroit area for vaccines, and large hospital systems like Beaumont, where I booked my parents at in mid-January. Those were actually the first vaccine appointments I made. Beaumont told everyone their process was invite-only, so basically a "wait and see" type of situa...