Hashflare Pricing- What am I missing?

[atc1-REAL]

Alright, so at present, Hashflare is selling 10GH/s at $1.40 for their 1 year contract with a maintenance fee of 0.0035$ per 24h per 10GH/s.

Assume I buy 1 TH/s (100*10 GH/s) at $140. At present I get approximately 0.00018430 BTC per day at that rate.
This 1 TH/s keeps mining for a whole year, so I get  0.00018430*365=0.0672695 BTC by the time my 1 year contract ends which at the present rate is around $550. The maintenance would be $0.0035*100*365=$128 approximately.
So, I end up with $550-$128=$422 for an investment of $140.

Assuming that the price and difficulty remains constant, that's an ROI of 300%! Of course that's impossible. What did I miss in my calculations?

[Zocadas]

You missed nothing. Hashflare missed to add all costs to info site, so that customers get trapped. There are not only maintance fees, but also electricity costs, that vary from pool to pool, whyever. In the last months, before Hashflare anounced, shortening lifetime contracts, there was even a ROI of 6 months. But most of the time it was on 22 months. Now they have a ridiculous withdraw minimum, that most of customers will never reach.
So, forget hashflare. I would categorize it as scam.

[Slow death]

What did I miss in my calculations?

This reminds me some time ago, I spent a lot of time calculating and did not understand why my gains were much lower every day, it was annoying and I gave up on these cloud mining sites, it was my money and time loss

Now they have a ridiculous withdraw minimum, that most of customers will never reach.

was a strategy to steal people

I would categorize it as scam.

lately he has done many promotions and this is not a good sign