Centralized? There's cryptothrift.com and there are a lot of users.
Yes. I'm aware
Several other competitors also
https://bitcoinauctions.net/
https://cryptothrift.com/
http://www.bitbid.net/
http://bidinbitcoins.com/
https://www.cryptoauction.com/
https://cryptothrift.com/
http://www.bitbid.net/
http://bidinbitcoins.com/
https://www.cryptoauction.com/
I cant find the source at the moment but I think much of the money was also going to fund supporting businesses for the OpenBazaar economy. OpenBazaar itself wont make money but the businesses supporting it (graphic design firms, logistics firms, etc) can
OB1