I've often wondered what competition the oldest profession in the world has for that title, and suspect that the various forms of pay-for-health (snake oil, modern medicine, homeopathy, even religious/faith-based) have to be up there. How could anyone -possibly- think it's going to go away now, just because one method is much more mainstream?
The BetterBlood site allows one to sign up to be a microscopist, and I don't see anything about qualifications (or needing a microscope) -- just plug in your name and email address and evidently you're in business, after agreeing to terms which say something or other about limited liability, taking legal responsibility for outcomes yourself, and so forth. My local microscopist is named Bub.
What's most sad isn't that people without any sort of training or certification can make money off of the desperate and/or those with alternative preferences, it's that if someone -with- mainstream training and widely accepted certification became involved they would almost certainly be liable for going against mainstream standard-of-care. As long as no-one is claiming to be a licensed physician they may be essentially liability free. Low risk, high reward..