as one can see, each site is currently available now.
https://worldcore.trade/ offers the lowest fee ever - 0.01% from the order sum.
one can withdraw the funds instantly with no delays. moreover, of the customer has any problems, he/she is able to apply to personal concierge 24/7/365. trading volume is about 2-3 btc a day that in now bad for an exchange created a few month ago.
read more about black PR campaign against worldcore:
http://worldcore-review.com/en/2018/08/21/article-navigator-customers-attack-worldcore-began-to-make-mistakes-and-the-media-to-apologise-for-slander/