That's amazing.And there are still more users registered everyday than the number of reviews written.
My ideas:
This is what I call 'you know what you should do' syndrome. This is where Person A thinks of an idea off the top of his head in about ten seconds and expects Person B has to spend the next X months carrying out the idea!
First find out why reviews to readership is very low. It is by any standard, even though it is very easy to make reviews.
What can sometimes make reviews difficult is knowing what is a fair points rating. An idea would be to give a better guide to rating. Here's the general idea.
1. Total s**t in terms of content, with writing skills bordering on illiteracy
2. Poor. Doesn't work very well. Poorly written
3. A mediocre story with barely acceptable grammar
4. OK, but lacks any real quality
5. OK, but has some promise, the author could improve it.
6. Somewhat enjoyable. Acceptable writing skills
7. Good. Was worth reading.
8. Very good, in terms of internet fiction. Recommendable.
9. High Quality. Very enjoyable and well written.
10. Excellent. Could compete well with published authors.
Or what about multiple choice comments so people can choose a comment that best reflects their opinion?