I wonder how many non-vegetarians are really going to want to buy a plant-based/meat infused/imitation hamburger?

That's not a business I would have invested any money in.

We have some vegan (thankfully non-preachy) friends. When they started, they bought Boca Burgers, and then decided — why eat something that tastes like the food they are trying to avoid?

We buy 100% grass-fed/grass-finished ground beef and make our own hamburgers. It doesn't get any better than that.