I don't know if a regulator would have had the foresight to see Instagram, which was still as much known for its filters as its social network as anything but a compliment? Look at how Instagram was seen as one of many similar products at the time:
https://www.engadget.com/2012/05/25/instacrt-puts-all-other-...
https://lifehacker.com/5970648/five-best-photo-filter-apps
An early rival, Hipstamatic, was named the Apple App of the Year in 2010: https://techcrunch.com/2010/12/09/apple-top-apps-2010/
Insta has taken on a life of its own over the last 2-3 years, but if they had chose to go their own way, whose to say Facebook wouldn't have clobbered them, in much the way they nuked Foursquare.
I'm not opposed to regulation, per se, but we should also be careful not to indulge in revisionist history.