[eel]

I have noticed an increase of reviews that typically contain a subject of "<Number> Stars", and either no review body, or a very short review body, such as "good book".

I too hate reviews like that, but I think it's due to Amazon nagging customers to leave reviews for things that are purchased on the Kindle. I am beginning to suspect they have an app or form somewhere where you tap the number of stars and write your review in a text block.

[ianburrell]

The Kindle prompts to "Rate this book" when you reach the end of an e-book. It doesn't give you the option to enter a review, but only select the number of stars.

[brianterrel]

They definitely do! I get follow up e-mails for most of my Amazon purchases which direct me to just such a form.