There are some services that wouldn't exist if it wasn't for targeted advertising. Instagram may have millions of users in the EU but how many would pay for the

There are some services that wouldn't exist if it wasn't for targeted advertising. Instagram may have millions of users in the EU but how many would pay for the service? The number that would probably would not be enough to sustain the network effect. And if Instagram users switched to mainly non-targeted advertising, Instagram may find itself not making enough money to sustain its company. While a 'competitor' willing to make less money could show up, their ability to collect / store photos or videos / update the ui / filter out inappropriate content would be decreased if they were barely profitable, making it a less useful service than Instagram was.