The survival of the fittest.

Yes and it says in the review that Tekton had been around 4.5 years before the review. So call it 16 years. But the OP will change the rules again. That's not "survival of the fittest" see because in that time they didn't survive they grew. Or something like that. Never can tell with these Rorschach type threads.

I stand corrected on the advertising. I don't read Stereophile or TAS, unless it happens they have something I'm interested in. Hardly ever happens. 

One of my first shocking experiences when shopping for good stereo back in 1990 was the number of what were to me totally no-name brands. This was back when I was reading Stereophile cover to cover, and everything else I could find as well. Looking back, its obvious I was brainwashed by marketing to disregard or at least not seriously consider stuff that sounded good simply because it was new and unknown.  
Live and learn. 

How long has Tekton been around?
Verdict is out as to long term success. 

Okay, I get it. This is one of those threads where the OP pretends to be interested in one thing (ie, "why certain makers continue to succeed") but its a bait and switch. Because the minute you answer all his vague list of possibilities he switches to "verdict is out as to long term success." 

News flash for you bud: the verdict as to long term success is always out. However long something has been around there's always more time so you can always say the verdict is still out.  

As for me? Over, and out.

Well let’s see the best one I know right now is Tekton, all made by Eric Alexander. To judge by sound they are the one thing you didn’t mention: value. The are an incredible bargain.

Marketing- no discernable marketing. Unless you count word of mouth, which is excellent.

Fit and Finish- I would classify Tekton as high end DIY. The value is in the sound not appearance.

Price- Covers a wide range from several hundred to around $15k with so many models people actually complain about too many to choose from.

Product availability- another one you don’t explain. If it means available in stores to hear then no, zero. If it means sitting around in inventory ready to ship then again no, more likely a few months wait.

New technology- Mixed bag. To one like me who takes the time to understand then its the first truly new technology in decades. To everyone else its a Bose 901 with tweeters. The technology is there just seems unusually hard for people to understand so we will count this one as a zero.

Manufacture association- lost me. Totally.

Profit margin- yeah it is kinda Job One, as you simply cannot keep making anything at a loss forever. Even Tesla will one day have to earn a profit. Well, maybe not Tesla. Elon is proving there is one born every millisecond. Eric makes enough to go drag racing AND have a track car. So I figure he must be turning a profit there somewhere.

Luck- The classic answer here is you make your own luck. By being prepared. Some of them might seem lucky. I bet every single one turns out they been working at it years if not decades before getting "lucky".

Read through the list again. You said sound leading up the rear? Quite the opposite.

Any chance you are projecting?