It is a completely independent and autonomous service.
Your service was created specifically to serve the forum. How it can be completely independent and autonomous service?
Because I have nothing to do with forum administration. And if you want, I can change the site description, and be the same as any image hosting service: ImgBB, Postimage, ImageShack, etc.
In other words, I do what I want with my hosting service, regardless of what the forum does. If the forum closes, I can go on my way without any problems.
If the hosting servers are outside the jurisdiction of the feds, then the feds will not be able to do anything
I don't know what you mean by not being under the jurisdiction of the feds. But, if you ask if the servers are in the USA? No, they are not.
Although that doesn't mean anything, because my service is exactly the same as other image hosting services. There are zero differences.