I visited one of their website (i don't know which one is "real") and it has common red flag among cloud mining website.
N-card series Mining Nest 1【NO.NBH-D065】
$100,000.00/40 Day
Contract Term: 40 Day
Contract Price:$100000.00
Daily Profit:$2100
Fixed Return:$100000.00+$84000
Settlement Time:Every 24 Hours
Affiliate Bonus
3%Level 1
1.5%Level 2
0.5%Level 3
1. From quick search, i unable who create ASIC "N-card series Mining Nest 1".
2. Fixed return is impossible on mining, considering price volatility, hashrate change and other factor.
3. The affiliate bonus sounds like MLM/ponzi, when the provider could just hand all profit to you rather than creating affiliate system.