I guess I don't get the big deal, i.e. this just seems like a standard 'subscription' model to me.
-I currently subscribe to a 'CSA' - I get a box of vegetables every week. I don't choose what's in it. I could also go to the farmer's market and buy them individually. I have a similar subscription that sends flowers to my mother every month.
-Back in the ancient times of my youth, you had these things called 'magazines'. You could buy them individually in the store, or get them sent to your house monthly.
Both the CSA and the magazine subscriptions were paid in advance for a certain period of time.
It doesn't seem that different to me. If you liked a magazine and were generally interested in it's content, you could subscribe. If you only were occasionally interested in it depending on what articles were covered that month, buy individual ones in the store or read them at the library. If you have too many magazines coming every month to ready, maybe subscribe to less. Don't fall for high-pressure sales techniques by Publisher's Clearinghouse.