If anyone hasn't read Max Dubler's 2017 PetaPixel blog post 'No, You Can’t Use My Photos On Your Brand’s Instagram For Free'. I'd highly recommend it.
https://petapixel.com/2017/07/13/no-cant-use-photos-brands-i...
There is a huge amount of copyright infringement that goes on on Instagram, but to be fair to users there isn't really any decent framework in place to make sure they're reposting legally.
I built Sharefair over the last few months, it currently is only accessible if you have a creator account (currently limited by Instagram's new API). But I'm hoping to include all account types in the next few months.
Let me know what you guys think!