Having interviewed folks from NSFW companies, I can tell you that it's a great place to beef up the resume and learn lots of useful skills. Their scaling and operations problems are fairly interesting and unique.

That being said, there is definitely a stigma that comes with it. I have no problem at all hiring someone who worked at an NSFW company, but I definitely have friends who have said "I wouldn't want to work with anyone willing to stoop so low morally that they would work there"