Pretty easy to find on twitter

https://mobile.twitter.com/jin_store

Thanks! Did you just outgoogle me, or might you have anything interesting to share about the market?

He's is well known if you every go down the rabbit hole of Apple internal devices, but he's by no means the only source of these.

I know of these devices from reading other articles, not an expert :).

From what I have heard in the past, Apple has only given them to specific researchers who they trust. It's very much a "We'll contact you" type of situation.

From a more grey perspective, the dev-fused phones do get stolen and sold around.

I don't think Apple has ever intentionally handed out dev-fused phones. However, they are planning to do something like that starting next year. [1]

[1] https://www.theverge.com/2019/8/8/20756629/apple-iphone-secu...

There has an article [1] about this been on the hn fp half a year ago.

[1]: https://news.ycombinator.com/item?id=19321270