Exsqueeze me here...
Let's look at history and just how long commercially available magic books or even magic kits have been available... I can assure you, it's not been very long and up into the WWII years, one would be lucky to find more than two or maybe three books on the subject other than the give-aways you might find at one of the larger shows.
In the post war years we started seeing "manuscripts" most of which were poorly typed and run off on the first "convenient" mode of self-publishing; the, mimeograph machine ("sigh"... I do miss that unique smell

) though major dealers, such as ABBOTTS in the U.S. actually had small batches of said material compiled until actual magic publishing companies started to take root. Even though Robert Nelson was publishing well before this era, it was the post war years that escalated his business along side that of Micky Hades (Hades Publications) and a few others of note. Nonetheless, magic remained somewhat exclusive, unless you had access to a magic shop chances were slim at best, that you could get your hands on actual books that taught magic... with a few important exceptions... bread-crumbs, you might say...
* Advertising in Comic Books
* Advertising in Youth Publications such as those distributed in the Scouting programs
* Scouting Manuals/Merit Badge programs
* Premiums Sold or Given Away at Magic Shows (especially School shows)
* Magician Themed Comics such as the old Blackstone & Mandrake series.
It was through these resources that kids would gain contact information to key magic shops who did mail order... and trust me, those of you that loathe waiting a few days for your order now days wouldn't have survived the wait periods back then -- 4-6 weeks being the norm.
Outside the possible discovery of books donated to the local Libraries, this was more or less the only way one had access to magic secrets without actually working for a magician or possibly a side show scenario.
Needless to say, as printing became less expensive and Television gave magic a unique infusion of popularity a demand for greater access came about. I'm not positive but I believe it was in the early days of Tv that things really started getting "commercial" but then by the mid and late 60's we had Svenagali pitches in the form of a 60-second commercial (TV Magic Cards & Kits). This was probably one of the biggest steps when it comes to magic secret access by the non-magician community.
The 1970s and early 80s gave the magic secret & publishing element some new and much needed "qualities" -- Legitimate Publishing Company support, which resulted in superior quality book lay-outs, editing, art work, etc. The methods had become less expensive and the demands of the market, far greater. BUT, these advancements in publishing resulted in our books becoming more "legit" in the eyes of major book retailers and thus, some well established "bibles" of the day stared seeing distribution to one and all; the general public had casual access to everything from the Stein & Dey Handbook of Magic to Tarbell. But here's the important footnote: Only the people that were interested in magic would look for said material even though it was sitting there for all to see, touch and read if they wanted.
But then we come to the 1990s and the world of Self-Publishing... granted, it had been around a few years when it comes to the PC advantage but now we had a thing known as The World Wide Web and Portable Document Files... anyone with a hint of savvy and a phone line, could peddle their wares. In very short time eCommerce was a way of life and affecting (or is that "infecting"?) ALL industries. It was likewise the avenue via which tons of misinformation was being spread, including Magic Exposure.
When it comes to our industry and the plethora of questionable material that keeps bogging down bandwidth, we can only blame ego along side greed (or at least the fantasy that one can make lots of money selling such stuff).
I happen to enjoy the ease of self-publishing but then I've had published material in circulation since the mid and late 1980s... an even on the topics of mentalism and seance work. But even I have discovered the pit-falls when it comes to this ease of publishing without the checks & balances one really should have in place. Granted, my "embarrassment" is one most writers endure; always going back and saying to yourself, "Maybe I should have done it this way..."
Anywho... the mass "exposure" if you would (and I'm not talking about the ugly sort of exposure) and availability of "Tricks" (not to be confused with "secrets') stems from precisely what I and others have said here; the delusion that publishing delivers name recognition and "significant" income. Many of the more enterprising writers using their work as a kind of lever when it comes to the political side of this industry; instances in which the cart being in front of the horse seems to have tentatively positive results... but as they say, the "proof is in the pudding" and when a writer is unable to demonstrate his/her ideas and have repeated failures... well, it seems that the pudding ain't quite ready, wouldn't you say?
Another important point that I've had several old timers bring to my attention is a rather logical fact... if all these writers are so good and have so much dynamite material, how is it they have time to write when they should be working that heavy show schedule they claim to have?
Of course they could just be writing when the season has a break
