I got the impression from previous messages that 3rd party purchases, like from Monoprice are available for trade ins as well. Correct me if I am wrong. Anyway $108 with free US shipping was a fantastic deal I think. It arrived within 3 days with the latest firmware. $24 worldwide is expensive, shipping fees should be much cheaper from Taiwan to China than to destinations on the other side of the globe. Despite you ship from Taiwan, shipping fees within Taiwan are also $24! That's non sense. There should always be at least 1 country, to which shipping is free but for whatever reason it is not the case with HD Fury official store.
By the way, the HDCP issue mentioned several times in this thread is still happening (despite loading a "beta" FW from you). I understand you test on Nvidia Shield, so I have Nvidia Shield as well, connected to TV via AVR Key. If I launch SPMC for instance, watch a movie, quit, then launch Netflix, I always get sound audio issue (audio not supported) resulting in no sound on the TV. Sometimes I just have to wait a bit to or try playing something else on Netflix, or quit Netflix and launch it again. It doesn't happen when connected directly. I do have all switches in mid position.
I believe this device is a premium priced, since there are other much cheaper alternatives. So I would definitely expect it to work as advertised but then all of the sudden after purchasing there are certain quirks with it or limitations mentioned by me before. Such possible awkward behaviors are not mentioned on the website, with the only exception being 4k60MHz usage for prolonged time.
Yes trade in available, but not at the same value if you didn't purchase from HDfury.com
Some places in the world cost more than 100$ to ship to, instead of charging each country individually, it was decided to charge everybody the same amount, some lose, some gain, at the end, all spend the same.
The only device in the world solving ANY issue such as the one you reported is Vertex/Integral2 and still there time to time we have to release update to fix something for a specific combo of source and sink brand/model, software version and settings.
For ex: you wrote you have issue with SPMC, can you repeat the same test with Kodi and do you have same issue ? if no, I guess you know where the problem comes from.
It's easy to blame the device in the middle that is supposed to work with any combo of source/sink variations, since as you said it's supposed to be made for that. Yet its not supposed to fix mistake, flaw and error at any software level.
Even top brand like Sony and Microsoft for playstation and xbox have in the past released firmware update that killed support for many HDMI devices, and sometimes it took up to 3 weeks to have an update and get things working back as they should.
Will you blame us for not being compatible during that period ?
Last, you can read this thread history and any flaw have been listed and one of them we are still looking for a way to reproduce, so it's all here available for everyone to knows and read freely, nothing hidden.
And you talk about reference design, you can take any of these cheap devices using reference design, they won't solve anything that have been solved here, once again, thread history speaks for itself. Never wondered why some have no public support ?
This being said, back to your issue, if you use AVR-Key, the purpose is to send video to TV and audio to AVR, so if you have "If I launch SPMC for instance, watch a movie, quit, then launch Netflix, I always get sound audio issue (audio not supported) resulting in no sound on the TV"
Of course TV can have sound format not supported, if AVR audio capabilities exceed TV capabilities, then source will often send audio format to AVR that is superior to what the TV can handle and hence, no sound. So actually no issue there unless you made a mistake in the description.