because photoshop requires skills and efforts while faceapp on a phone works in realtime, hence you get faceapp pics.
But hey, not like you're paying for them to complain.
She can't post BDSM stuff she wants to anywhere she usually posts. They remove anything rough. Most sites/countries even think a girl sitting on a guy's face is humiliation. (Which says a lot about the people passing the laws.) If she can't post someone beating her up, she can only post the bruises and imply it.
She's already tried to post "struggle snuggle" vids. It's not a slippery slope it's a chasm. And the only guard is an idiot who thinks fisting is torture.