RE: What happened to earnings?
I don't know if earnings have gone up or down in general. I know that individual people will see differing results, depending upon their catalog of reviews. Are your old reviews still relevant? Are the products those that are inundated with reviews, or are you the sole reviewer?
As far as the new reviews you posted, you won't see earnings from them until the following month's IS Distribution (normally before the 15th of the month, and frequently earlier than that). So - in the next two weeks you will [hopefully] tip that scale!