Wow. Kinda bitter, eh? Oh, and thanks for labeling hundreds or possibly a few thousand of your fellow hobbyists as "gullible." It's not like we all are chemists or deal with tubing professionally.
I'm just a customer, not involved with their company in any other way. However, they do specify the tolerance of both styles for 1.75mm, though for 2.85 filament I only saw the ID spec'd (though I didn't look too hard). And, if it isn't PTFE, they go to a lot of trouble discussing and providing safety considerations for it. If their tubing was involved in a fire, and somehow didn't behave like PTFE, there's room for litigation. That would be a huge risk on their part.
Is it an existing commercial product that they're putting a spin on? Perhaps. But the vast majority of hardware used in our printers either already existed commercially, or is only a step away. Are they making an obscene profit off it? Perhaps, but if their tubing really is what they claim it to be, they undoubtedly invested a lot of time and money before they ever turned a profit, and deserve to be rewarded. That's called entrepreneurship.