I didn't know Amazon had this, but just ran across it. Apparently it is an Amazon company as well. You pay a monthly fee $5.99, then can read unlimited comics etc.
This shows how it works:
I wonder if @O-Tron has used this?
I see Starz now has a subscription service that ties in with Amazon. I was recently looking at it since it has so many Disney movies. Not to bad at $8.99 a month. Has anyone used it yet?