Johnny,
Just today I ordered Topicanna... I was order #6158 and I paid about $40. If everyone ordered only one product at $40, revenue since inception would be $246,320. Assuming not all orders consisted of one item, it's safe to say that number is higher. The site has only been up about a month and has already made at least $250k-ish.
Another assumption is that Tauriga will aim to increase their orders month over month, as is the goal in every business. Completing the MOU and exposure in general will attract interest in the products, and likely lead to a lot more orders.
I, like you, was also skeptical of the product line aspect until a couple of other members here shed light on the numbers. Whether those numbers offset other expenses remains to be seen, but the fact is that we now have tangible products... An extremely significant milestone for a company in the building stages. I still believe Pilus is worth sticking around for, but for now, the product line is something to be excited about.