It was someone from the agency gone rogue. Nice guy actually, we chatted a bit and I got some insight as to how things work. He also sent some screenshots showing how they nickname followers to have the information handy: https://gofile.io/d/C2mFf9
They work 8 hour shifts, so three people managing pages around the clock. He said they switch between four profiles at a time and just go through the vault for pre-recorded content that the creator submits.
Unfortunately I fell asleep before I could get much more from him.
Her side of the story is that she was "hacked" but it really feels like she indeed has an agency. That seems way more likely. I had a feeling but this just confirms it. There goes my suspension of disbelief...and desire to pay!