Plenty of people who do NSFW stuff online stop after getting into new relationships.
Half of the posts in the just chatting section of this forum are 'baseless speculation'. It's kinda hard to get concrete proof of anything from people who make porn. Shockingly they want their private life to be, you know, private.
All we know is pom stopped posting on pretty much everything around the same time. Why isn't an answer we are likely to get.
I'm not saying 'oh she's definitely now in a relationship'. I'm saying that a young attractive woman in college getting into a serious relationship and no longer posting NSFW material on the Internet due to said relationship isn't entirely outside of reasonable speculation.