Don't make the mistake of making equivalence between Avalon and any other supplier. What Yifu and Ngzhang did was far worse than what any one else has done in this space by a very long distance.
Orly? What Yifu did is by order of magnitude more honest than what ScamFast did, and this comes from a both Avalon and HF victim. Eventually we all got full BTC amount back from Yifu, his greatest sin is destroying the dream of small miners to ever get in the fair mining game with the big boys. ScamFast deliberately lied with the intention to keep most of the BTC and never refund them in full to customers. Avalon is greed and incompetence, HF is pure scam, how can Avalon be worse?
Actually wait Avalon does was waaaay worse. They held onto batch 2 orders for 2-3 months while THEY MINED WITH THEM. So not only did they delay shipment if their miners, they actually STOLE money from their customers. I personally lost 60 bitcoins on my batch 2 order because of them. So yeah, Yifu is scum of the earth, almost as bad at the retards from BFL.
Hashfast are angels compared to them.