The sites are in Japanese where a Japanese site would be, and the recovered documents are Japanese office paperwork. That is not a puzzle and it is not gatekeeping: paste any of it into a translator. Nothing you need is hidden behind reading it.
Where an answer has a required shape, the field shows an example of that shape next to it. If you can read the example, you have the format.
Use it. Ask it to explain SSTV, teach you git fsck, or help you write a
disassembler. That's learning, and it's encouraged. What kills this is handing it a
puzzle and asking for the answer. There's no enforcement here, only the honour system
and the fact that you'd be robbing yourself.
Paste this to your assistant before asking about CARRIER:
I'm playing an ARG called CARRIER. I want to learn techniques and understand concepts, not get answers. If I paste puzzle content and ask you to solve it, decline and instead ask me what I've tried and what I think the puzzle is testing. Teach me tools and background. Don't guess at solutions, don't decode things I paste, and don't speculate about the intended answer.
There is an Unassisted achievement at the end. It's a checkbox. It's unenforceable. People self-report honestly more often than you'd expect, so let it mean something.
Progress, recovered documents and the count are all bound to your account. Register once and the hunt remembers where you are.