On the last day they had a price of 0.6 $ for 10 Gh or 60 $ for 1 TH of bitcoin mining. ( this price reduction was since 19.04.2018) as they state on their Twitter page)
For the moment there are no more contracts but I am positive that they will bring back more contracts soon, because they setup a new mining facility:
For those who do not know Hash Coins is the manufacturer and Hashflare is the cloud mining service.
In this video you can see what type of hardware are using, witch it is ASICs
If you look close you will spot a difference in ASIC build and circuits spread on a board that is different than BITMAIN witch can suggest that Hashflare-Hashcoins is actually making their own circuit ASIC for mining as they stated before.
On hashflare I have 306.37 TH/s of bitcoin mining contract and If they will return with good prices I will continue to upgrade.
I also have 29 referrals but only 1 bought a contract so almost all of my investment comes from personal funds and not referrals:
Well In my point of view there is no right answer for this but there can be some suggestions.
I like very much their platform and their style of business, in witch their are open with their customers and provide videos and interviews as proof of their operation as well as answering hard questions of their clients.
For the moment I own 1.8 TH/s Of bitcoin Open-Ended contract (lifetime) on their platform with zero referrals so once again it is personal investment.
They have a large variety of contracts that are from 1 year to open ended contracts with different prices.
I personally prefer bitcoin open ended contracts as you have time to re-invest in your own time .
https://twitter.com/ccg_mining
Read well and stay informed at all times as they do communicate often with their clients.