It just blows my mind that people will pay good money for something and then totally lose interest in it
Really? 99% of all fitness clubs are built on the business model that the vast majority of their customers will pay them $100/month and never set foot inside the building. And the vast majority of treadmills, exercise bikes and the like end up serving mostly for hanging laundry and collecting dust.
Our intentions often don't match our actions. Okay, I gotta go call my mother ;-)