I heard of Oyster ebook subscription service long ago, but from what I could tell, it wasn't exactly the the "Netflix of books" it claimed. Yet curiosity got the better of me when I found a summer deal offering three months for .99, so I pounced. And basically wasted a buck (well, maybe not wasted, since it taught me I no longer needed to wonder whether I'd enjoy Oyster).
Before I popped on the offer, I searched Oyster for books I wanted which weren't already available from Overdrive at my local library (I prefer checking out ebooks -- I've gotten to the point where I like reading them better than physical books, and they're more convenient to get from the library). Oyster had every title I wanted, but they were only marked with a purchase price. I assumed that once I was logged in as a member, these books would be included to read for free. Haha. Hahaha. Silly me. Of course they weren't.