Which mining companies are recommended now? and does others use Amazon EC2? I'm renting for m7m algo, need some opinions for others tested mining rigs.
There's only 2 worth considering:
1. Bitmain has the price advantage.
2. Spondoolies has the quality advantage.
Although I think Spondoolies has both the price and quality advantage at the moment. I just upgraded from 2 S3s to an SP20.