I've been involved in the Internet marketing business for quite a few years now and and I've also studied Lucille's websites and sales stuff. I believe she is primarily a marketer who is creating selling "products" aimed at the transgender niche. From reading her blog, it's evident that she can produce some content useful to TG people. Being a woman herself, she obviously is qualified to give a good deal of advice regarding how to present oneself as feminine, and in her bio she claims to have a background in fashion. I doubt, though, that she is any more qualified than many people on this forum at advising or instructing you on TG particular matters. She's apparently not any sort of accredited therapist or professional. I think she's first and foremost a businesswoman.
While I see no great harm in the marketing of e-products at excessive prices, I've long found her heavy marketing of non-prescription pills to be quite disgusting. I hope no one has suffered any severe health problems self medicating using pills she has pushed, but I think it is entirely possible and I find this type of marketing thoroughly despicable and inexcusable.
I've little doubt that with a bit more web searching, you can locate for free most all the worthwhile information she provides in her expensive ebooks or A/V products.
