Yeah, NSFW, but the ones that are are really great. The ones that weren't didn't upset me, I used to get my MLP and Furry art from e621 (before I switched to e926 and got more familiar with DA) so I've seen it all (wish I hadn't but what's seen cannot be unseen).
I clicked the link to go to their tumblr, but I didn't keep reading to see that you said it was NSFW. Whenever I click a link that takes me away from the deviantart page, I get this message: "You are now leaving deviantART.com. Be warned! Out there be monsters.
If this is what you intended, then follow the link below."
One says go back to deviantart, another is the link to the page I want.
Though Princess Molestia would remain the icon of pony fandom femdom, Little known Applestation once held an introduction within the dark corners of deviant art, never quite earning the popularity of the aforementioned princess due to the difficulty of skewing the name "Applejack" into a rape-related nickname.
Let's just hope she's more gentle then the princess.