Earlier quoted context omitted.
"But in total for a year," In other words, a year's worth of this (which is based off the idea that you would actually be using it. If you plan to use something you don't just stop using it after a month), is an entire month's worth of rent that you could pay instead. Or maybe a different perspective, a month's worth of this is the same price as a month's worth of groceries.
The service is $50 per year. unless I’m also confused here.
When I read it it was 50$ per month, so many they have changed their pricing? Or I could have misread?
fake edit: yes, they reviewed their pricing since I read it. the "sync" tier used to be at the 50$ mark.