Their company is https://1pool.ltd/  and they say funds are safe.
Time will show whether they take the road to hell or the road which btc-e took after their experience with FBI.  That guys formed a new domain and gave back all the users funds. We will see.


https://www.sec.gov/news/press-release/2018-218

update 1: only the domain has been seized. As I see from the about page, the company is registered at Marshall Islands where the jurisdiction of FBI does not exist.


update 2:  They have opened a mirror site but only read only version : https://1broker.io    
Source:  https://twitter.com/1Brokerio/status/1047421765482434560



update 3 : They have enabled withdrawals by asking some data(name, surname, country of origin) and accepting an agreement. 
source : https://twitter.com/1Brokerio/status/1050365723435040769