How many lifetimes will it take to recover the $167 cost of the miner, assuming you get the 700mW of solar power for 8 hours a day, mining the most profitable cryptocurrency as of today?
Perhaps you could state that the user can only expect to make back a small fraction of the $169 cost in a lifetime of mining, and that its primary purpose is instead that of a functional piece of art, which I think it is.
Unfortunately it cannot mine with the PoW I created [1], or I might be tempted to buy one.