Imgur now blocks several VPNs and have issues loading embedded previews in several fediverse platforms. So instead of using imgur, you could use one of the following alternatives for uploading your images.
https://postimages.org/
https://imgbox.com/
https://imgbb.com/
https://www.imagebam.com/
In theory, yes. In practice, no. E.g. Russia is known to ignore DMCA takedown requests and there is nothing anyone can do about it.