You can't understand a compound term by looking up the words in a dictionary. BDSM was a term created to label a lifestyle(s).
Without consent, bondage is a crime. Without consent, Dominance is just being an asshole. Without authority discipline is abuse. Without consent, sadism is a serious pathology and masochism is a disorder.
The key is informed consent and everything in that article is about deceiving and manipulating men, "men sending me money for no apparent reason and nothing in return but my disdain". There is almost no discussion of the clients, ie the subs not her finDom students, it's all about her and her business. Contrast that with most other positive stories on sex workers who gush about their clients and the service they provide.
From the little I know about you'd probably make a good (non-lifestyle) Dom but I don't think you'd learn anything good from that lady.
I hope this doesn't sound too strident as it's kind of an important issue to me