Hello so I have been using Instagram for a while and I always question that how do they make money?
It's a free application and also it does not show any advertisement. So how does the business run?
Facebook is now the owner of Insta. But Insta doesn't show any ads, so how they can afford to manage?
The information you voluntarily give them while using the app is valuable to advertisers. All the content (photos/videos), GPS location data, hash tags, comments belong to Facebook once you post them. They can trawl the data using data mining tools and sell the insights generated to advertisers looking to connect better with their target audience. In the future (or maybe even already), they could use image processing tools to gather useful data by analysing the photos themselves.
In summary as many have said before, if you are not paying for the service, then YOU are the product being sold.