I am a Service Manager and chief tech at a shop that does everything. One side is lube and PM, the other repairs. I don't have time for gimmicks. I don't hunt for repair work. I have plenty legitimate, daily work to keep me and my technicians busy.There is nothing "free" about a multipoint inspection.
The reason for these things (and 9.00 or 19.00 oil changes) is to get the car in on the lift so it can be inspected for any work it needs, weather or not you realize it.
They do this for free everytime they do an oil change (in a real shop). Quicky places don't get the wheels off the ground so sometimes they miss a lot.
If you do all the service yourself and have no complaints, it isnt worth it.
Your email is a marketing strategy utilized to try and get you in so they can hunt something down. If you go in, don't sweat it. They can't force you to do anything. Make sure the check is free. FREE. When the "adviser" comes to you with his list, ask him to print out the techs findings, with cost estimate of repair so you can budget accordingly. Leave with it, and check it out for yourself.
GRAVY. Maybe they will find something you overlooked.