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/
Lemmy instances have quite small size limits compared to other services. And all of them are vulnerable to DMCA takedowns as they have to comply with the laws of the host country, but unless you plan on hosting CSAM you are good with either choice.
But all have a good track record for keeping images online without deleting.