Gleb Gamow, an old BitcoinTalk regular who’s busted many scams over the years, dug up some disturbing info on 1-hash. Basically it appears that their team photo is a fake, stolen from a legal firm. 1-hash have since removed the team photo but I trust Gleb, given his reputation and many years of scambusting.
See the thread here: https://bitcointalk.org/index.php?topic=1788274.0
Given cloudmining is an industry full of scams, this kind of dishonesty gives me enough reason to distrust 1-hash and advise you to avoid them.