Philipma1957 on Bitcointalk.org asked about akminer.com, and I replied his post yesterday. Seemed a lot of info cannot be posted comprehensively, so I moved it here.
1. Below 3 companies are related. https://www.evensontech.com/contact-us/ This company looks like a shell http://www.tankya.com/art/about-us-1.html They have a HK company but already stopped. The current company names are 深圳市首尔诺科技 and 深圳市云博瑞科技. These 2 legal entities are both good-standing right now, just with a tiny registration capital of 200K RMB ~ around 30K USD. The boss is Mr. Su Jiancheng 苏建诚 https://akminer.com/ Seemed they did not found a dedicated Chinese legal entity for Akminer, although not a big issue
3. Joyson's 2 emails firstname.lastname@example.org;email@example.com and 2 cell phone number 15818167740 18682005253. You can try to add his Wechat by the mobile number.
4. Some Reddit posts suggested their service not being perfect, but majority posts said they are not scammers, just imperfect in a few cases.
AKminer's main office,
Joyson Hu's information. Perhaps the easiest way to communicate with him is by Wechat.
Disclaimer: Caution should be taken when making purchases and although the information provided gives you some indication of trustworthiness, ultimately we do not and cannot provide assurance that the company is legitimate or should be trusted.