10 days later, Hashflare did finally respond to me, apologizing for the delay, and crediting me for my payment!  So, at least my payment went through eventually.  They're probably just far slower handling these situations right now than a reasonable person would expect.  So I've corrected my trust feedback about Hashflare, and I'll expect that they're not a scam.

UPDATE:

Hashflare has now given me credit for my payment.  So in my case, they turned out to be very slow, but trustable.

After a full 10 days of wondering.. I received my first ever email communication from someone at Hashflare, apologizing for the delay, and saying that they've accepted my payment for hashrate:


Okay, yes, that apparently did happen.  Now that I look at the blockchain transaction, that's something I hadn't noticed, that the amount transferred went lower, without my being notified nor warned about it by the exchange I transferred it from.  So, don't do that!  But, hanging for ten days wondering if they were deliberately not answering looks very bad.  But now it's fixed, so they may need a lot more extra time right now than even patient customers would expect!  I have just removed my negative feedback on Hashflare's profile here, and updated it with positive feedback.

https://bitcointalk.org/index.php?action=profile;u=514754

Everyone: please update us with what happened with your payments!

I use extreme caution when copying the receive address and making a BTC transfer.  I checked it over more than once before sending it.  It is the correct receive address that went to Hashflare, and the BTC is now in their possession.

It has now been 9 days and I have had zero response from Hashflare .. so far this is a theft.

The same thing happened to me.. and it has been more than 8 days, with no reply at all from Hashflare and no hashrate was added to my account.  I guess they don't care.  I filed this scam warning because I do consider this a theft, unless Hashflare does something about it:

https://bitcointalk.org/index.php?topic=2557713.0

Even if Hashflare was to provide either a refund or allow the purchase to go through, so much time later, maybe because these warnings are posted publicly for all potential investors to see, we never agreed for Hashflare to borrow our cryptocurrency for a large block of time, so we should be additionally compensated for that unauthorized loan.  Hashflare?  Are you going to do all of that?  If not, then this is a scam.

UPDATE: MY OWN PAYMENT WAS ULTIMATELY CREDITED BY HASHFLARE, AND I HAVE GIVEN THEM POSITIVE TRUST FEEDBACK NOW.  Others are replying below about their own payment experience with Hashflare.

Story: I attempted to purchase hashing capacity on the Hashflare.io web site, paid for it with BTC, and my order on the Hashflare web site stays in "Pending" state (as of right now more than 8 days later).  Even though I have used their "Contact Us" feature of their web site to open a ticket about it, which is also the only way I can see to contact them at all, I have received no replies from them at all.  UPDATE: They finally responded 10 days later and accepted my payment.

Profile Link: https://bitcointalk.org/index.php?action=profile;u=514754

Reference Link: https://hashflare.io
Amount Scammed: 0.06110000 BTC
Payment Method: Bitcoin
PM/Chat Logs: None because Hashflare doesn't offer any way to chat with them!  UPDATE: They could certainly improve on this, but they apparently do eventually handle every support request via email, just agonizingly slowly.
Additional Notes: I attempted to contact anyone there a few times, via email, and I have simply been ignored.  My BTC is gone and I know that Hashflare received it (see the blockchain.info link).  This is apparently what they do to new "customers", they take us through several steps on their web site to buy hashrate, give a BTC receive address, and then once the BTC is transferred they simply keep it, providing nothing at all, and then they don't reply to any support requests.  The excuse is that they're too busy to bother.  UPDATE: They finally did handle it.