It's not bought as an aphrodisiac (you are thinking of rhino horn), ivory is mostly to make decorative trinkets.
2. How is the market for trinkets that big.
People have been suggesting this for some time but it would probably only drive the interest in genuine ivory
> 2. How is the market for trinkets that big.
Ivory in China has been historically a symbol of wealth. The growing middle and upper classes in China want to show off their wealth, what better way than by buying something like this
https://geography3822.files.wordpress.com/2014/11/ivory-on-s...
See:
https://www.nraila.org/articles/20140305/ivory-ban-fact-shee... http://www.ptg.org/scripts/4disapi.dll/4DCGI/cms/review.html...