Since it was deleted in Hashflare.io official thread.... I'll post it here again:
So I did some more digging now.. They are very secretive but Estonia is luckily a small country
I can confirm, that they have some... how to call those.. not DC but.. ee.. small bunkers and old not used buildings equipped with their hardware (I mean not produced by them but hardware they own, eg alcheminer, gpu farms..).
They also work with local green-energy powerstation operators to get cheaper electricity.
They have similar buildings also in other countries as everybody knows, you need to find cheap electricity to be able to profit.
I know one guy who's college left his current job (from big company in Estonian sense) and went to work to hashflare operator company (I believe it was hashcoins - they have many companies to optimise taxes, can't keep track on all of them).
They have office where ppl work to think new ways to generate money
It includes new "investment" opportunities for (l)users like us to be shown soon.
Their head guy has lot of money and does not hide it.. why should he?
They started as Estonian company, but nobody haven't seen any native estonians in their crew.. so it just happened to be a country where russian money met europe
pictures of their DC on the homepage are very old, according to my findings they move out from there long ago..
conclusion: they exist, they operate, they have equipment. I invest with caution, as they even refused to be open for Estonian Crypto Currency association (they are member of), hiding behind "security concerns" - meaning we don't know how much they actually own of total hash power and how much is like LTCGear
thank you for your attention.
