This is a difficult question to answer, because again it varies between companies. However, the golden rule as far as the industry as a whole goes is that generally speaking, the Instagram growth services out there that are offering genuine engagement from real Instagram profiles can’t actually predict the exact number of followers you’re going to receive from them every month. This is because they do a lot of work on your behalf to attract people to follow your Instagram profile, but at the end of the day, they can’t force people to follow you. If they are the kind of Instagram growth company that sent you fake followers, then they would be able to predict the exact number of followers you would receive.