That seo cycle graphic says it all! lol I don't care about an author name for my websites. I give them branded type author/site owner names. The website should offer the trust-ability, not the author.
For my samurai website i had the profile pic and name of an ancient samurai lol I didn't need to make up a fake joe bloggs profile name. I think i just said something like "Author studies martial arts, and has an interest in samurai and ninjutsu training." Which is true, and is briefly relevant.
I don't need to show them my face, and tell them where i live, and what university, and how many cats and dogs i have, and what size of mason jar i use for my pickled jam. lol (yes i've seen quite a few fake profiles before too! lol)
Make your website about the brand name, thats where the power is I think. I used to do fake profiles on my own blogs, like I had an older woman, on a site for sewing machines. But i'm not an old women, i can't write or get different writers to fake an old women technique. You have to understand that as time goes on people become smarter to existing technology. I remember I was one of the first broadband and computer users, before many of my generation had it in my country. Now that advantage is gone and irrelevant. Bit like "Genuine!" profiles, and the understanding of what is a sales pitch.
For the big casino sites i've seen they are owned by a company, and the site name does the heavy lifting. I can remember bet365, ladbrokes. But i never seen or heard or could even remember the name of an author on a blog post there or linking anywhere else.
The only pundit for betting i remember is the dude called John McCricket. He's how you create a profile for a business! lol
You couldn't fake a profile like his, but if you had a gambling authors on a casino blog, you'd be better of : Bill J, Peter D, Sandy W, etc and have each time a new author writes for you to use a new name. Preferably you as admin want to post regularly too under admin name or a consistent username.
