Of course you cannot trust to any site like that, online mining services, I mean. Many sites like this one turned out to be scams, so don't invest your hard earned money into online mining. If they are giving some mining power for free use that like you can use their referral system and that can pay out for you, but do not invest your money. Good luck!
Ok, but Im just telling my experience using their services in 8 months... and with some patience I was be able to get my money back and for now one Im having only profit.
Of course 8 months ago the crypto currencies world was different... and now the ROI is uncertain, because the bitcoin price and that they rise the price to buy hashpower.
Im using this BTC calculator:
https://www.cryptocompare.com/mining/calculator/btc?HashingPower=1&HashingUnit=TH%2Fs&PowerConsumption=0&CostPerkWh=0Hahahaha... You have 'invested' at Hashflare 8 months ago and now you're "only having 'profits'"? Hahahaha.....
Could you please check the price of bitcoin in April (8 months ago)? It was less than 1200 USD. If you were to JUST BUY Bitcoin itself 8 months ago you would have made more than 1250% net profit over your 'investment'.
However, since you think you paid for cloud mining let's look into what would have happened if you had actually 'mined' Bitcoins. Mining with a mining device like Antminer S9 would have given you at least 2000% profit over your investment on the device (even when the electricity cost is taken into consideration).
I am pretty sure you BARELY got the USD you invested 8 months ago and maybe at best, you have made 300 to 400% percent profit at top of your 'investment'.
It's a huge scam. If you or any other guys here don't like the word scam, I would use a better one: it's a blatant burglary. They're stealing your money and making not millions but billions of dollars for themselves. They are not even rewarding 60% of what they should be rewarding people.
Good luck to all.