So, like everyone else here, I bought a text blade around 2015 and have been wondering what happened every since. About 3 years ago, another customer did a lot of digging and this is my memory of the story.
Two guys came up with the idea of the text blade. One of them registered the patent. Then they fell out. The one who didn't have the patent, set up the text blade business, and started negotiating with his ex partner to buy the rights. It's only a patent infringement if you SELL the product, so to keep things going as he negotiated, he would ship out FREE test product.
Personally I would have thought they would have hammered out a deal, but I guess not!
Textblade always (to my knowledge) refunded any payments in full, so there's no legal re-dress to answer. I do think that investigative journalists should have picked this up though!