Hi, there
App ratings have a great influence on app ranking and can help you build a reputed app. Also, if you have more app ratings, you will get more potential users so that get more and more installs at soon. BuyAppRatings is one of the app rating provider, and they offer a huge discount if you place a big order. Each rating is priced at $0.5, and you can get same installs for free. It is very cost-effective.
looking forward to cooperate with you and good luck!