The cash credits got revised because there was a bug and it got fixed by our site admin. Check the announcements for cash credits for blogs, knols and yahoo answer links.
By the way Mr. Subba Raju, even though you will be given Rs. 5 as a cash credit for your review submission, when it is approved and rated by the editors, if the points are less than 5 you get less cash credits. You have to give good reviews for all the products. Just two liners or single paragaraph reviews, though are approved, will have less priority points. The best review gets, more priority and they also get more adsense revenue and more cash credits. Check out my reviews for some of the mobile phones and Mr. Ankush Das's review for Transcend Digital Photoframe. You will get an idea, as to how we rate the review.