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I am using Hashflare as you might know from my earnings spreadsheet and I love the returns and reinvestment options. Anyway, the difficulty continues to go up, which cuts into the profits and I had a tough time finding reliable information on this. Well look no farther, this site has a constantly updating chart and is extremely accurate. Link below as well as link to hashflare if your interested in getting into cloud mining.
Difficulty site= https://diff.cryptothis.com/
HashFlare= https://hashflare.io/r/96542179