Tons of it could have been outsourced. Give a few people account access and some direction and you can post as much as you want. Maybe she put in a few hours each day/did enough drive by posting to keep a reasonably unified tone. Then when shit hits the fan and she dips out the shady-but-less-protected posting team gets out of dodge. Maybe they just stopped getting paid.

Alternately, she was a terminally-online adult who could get away with it because she had no real job and/or her job was to be a quiet influencer of a pedophile-infested website.