The providers of incentivized installs are companies which can help you to promote your App. Success often depends on whether the new product will be able to get to the top most popular new products. To be rating high - you need to boost your traffic, but at the begging it is very difficult to get organic traffic, so many App developers use service of this companies to be in demand for the future. What your opinion, guys?
You can buy incentivized to boost you app ranking and visiblitily on google play in order to get organic traffic
it depend on what niche and what kind of app you got, competition from other developers, Aso …
i personally use the service on my signature to get installs, reviews and to boost my apps ranking using keywords install