Wishful thinking. It's chip-on-board technology, which lowers the cost of the final product. In the toy business, every penny counts.
Anyone can decap a chip package these days, the COB resin is not any more secure.
https://learn.sparkfun.com/tutorials/how-chip-on-boards-are-...
http://www.ue.com.hk/index.php/Saving_Cost_-_Bare_Die_Assemb...
But it seems that the echo-light is somehow coupled to the eyes, which is nice.
[I am now imagining the Star Trek episode "The Trouble with Tribbles" where all tribbles are Alexa wrappers... X_x save me!]
It's not clear how much the Alexa Voice Service would cost in a commercial product?
So I assume is it free if you build a product for it. Maybe they want to achieve world domination?
... so I guess at no cost?
On the other hand, I'd love to code the pi to randomly make the eyes blink and move on occasion.