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.