Yep, kinda sad they charge for reviews, I know its all business but still...sad
But it is hard to see much benefit in a paid review especially with the fees they charge. I have yet to hear anyone but the people selling them say they are effective. If a site is big enough they will make most of their money from advertising not paid reviews (since they normally aren't good to read since they are designed to please the person who paid not the person reading).
I might try a few cost effective ways next app. Do a few fivers, do a few tweetintos, use my own social media and then post in all the forums they are okay with it. I don't really know what else I can do without a significant budget. (for example chartboost recommends a min of about $500 of ads a day to make a difference in the charts).