NSFW images being used in public albums within Imgur's platform has been against Imgur's moderation policies for ages, and they're not gonna ban NSFW material from being uploaded outright, they would just prefer any NSFW albums to be 'hidden' (which doesn't stop anyone from linking URLs to said images and albums anywhere else, it's just that they're not visible to everyone on imgur's public galleries).
Again, they're just being more consistent with their existing policies on what they want to publicly show on their own site, hence why they're providing links to alternatives for people who want to few NSFW subreddit material. You guys are making mountains out of molehills.
While I totally get and would like more sites to be more NSFW-friendly, that's still an uphill battle both culturally and commercially. Paypal, for instance, is still very much is prejudiced against NSFW material.