There is a similar try from Chinese community, that was founded by @James Gong, please take a look at https://dacx.com/ , where you can buy BDR.
However, it was only popular at the beginning, then people lost interests. I guess the main reason is that people can always find other ways to invest xDR, Bitshares is not the only choice.
IMO, the first priority is to find more application for bitUSD. When the market cap of bitUSD is big enough, then everything will be easier.