The Digital Review Economy
Digital stores (Google Play and App Store) rank apps based on the number of downloads and positive reviews. For this reason, developers are willing to pay good commissions to get real and honest reviews from actual users.
How Does This System Work?
Through platforms like DollarTask, you find offers asking you to download an app, use it for a short period, then write an honest review in the app store. In exchange, you receive your commission agreed upon in advance.
Professional Ethics in Reviews
A good review must be honest and reflect your real experience. Don't write a fake positive review for a poor app. Apps that request paid reviews are generally good apps wanting to accelerate their spread in their initial phase, making your experience and rating mostly genuine.