Subscription Equipment Maintenance

[Tiamo Wright]

I have seen this a lot in Denver, but wondering if this is prevalent elsewhere. I recently had some work done on my AC unit and my furnace over the last few months. Both companies tried to enroll me in their "membership" for a few hundred dollars a year. Has anyone used these in the past? Pros and cons? I have had the home warranties on a few homes and they always seemed like a big waste and they never really fixed anything that I needed so would love any insight on the direct subscription with the vendors.