It’s not safe to assume that putting information into a profile means that they want it be utilized in a programmatic search or be collected off-site for marketing use.
Users have a wide range of potential motivations for using IG. I know a good cross-section of startup founders and another cross-section of artists and the use-case and expectations for both groups is wildly different!
Further, many IG users are simply using it as the latest iteration of Facebook. Scraping personal information — even if it’s exposed in their profile — might feel like a violation of the relationship they expect to have with a vendor in IG.
This is just, like, my opinion, man.... and I don’t know if it can work for your business but if you find your way out of this mess I encourage you to look at it more from the perspective of users who engage heavily with you, not users who have the most leverage. A subset of your engaged users will also have a lot of leverage.
You want your evangelists to evangelize because they really believe in you. You can manage a relationship with a small number of good evangelists personally rather than through a soulless mass E-Mail (or whatever medium you might use).
A rev share (like you were trying to do) is great but you want to think about it like you’re supporting your key evangelists and reducing their friction in talking about what you’re working on.
Best of luck! I hope you sort things out.