Empire Market is fine and most trendy Onion Network Market at the time. Being this big it faces the problem of regular Ddos attack causes main Empire Market URL to be down, and alternative URL too. That means to empire market have to make more and more URLs and onion mirror and links. And the problem is that there is not too much ways users can find a fresh Empire Marketplace mirror.
So that's why Empire Marketplace decided to create an original site where their users can always discover fresh URLs and onion mirrors, for instant enter to Empire Market. Here it is http://empiremarketurl.com make sure you using it every time you you wish to enter to darknet market empire market.