This is a neat promotion - Consumers Energy is offering rebates so Nest and Emerson thermostats are essentially free (still pay tax and $5 shipping).
https://consumersenergystore.com/Electric customers have to enroll in a program that lets Consumers Energy control their smart thermostat a few days each summer, but it helps Consumers Energy get off coal quicker so that's a neat upside.
Even if you don't have Consumers Energy, a lot of utilities today have marketplaces that offer instant rebates for LED light bulbs, smart thermostats, shower heads, etc. Good way to save money and help the environment.