As a Mystery Hunter who stumbled across this while trying to find the solution now that Hunt has ended (the official solution only links to the Listener solution which doesn't seem to be uploaded yet), I can explain the scale of Mystery Hunt! Hunt is a 3-day weekend with 100-130 devilishly hard puzzles (no instructions are given, so figuring out what to do is part of the puzzle, and the answer is always a word or phrase which is interesting when you start off with what looks like a pure logic puzzle) designed for teams of 20-100+ solvers with computers (some puzzles require writing or running particular programs to solve) and full access to the internet (allowing a large range of esoteric trivia to be used). The solving process is very collaborative, with many people contributing to solves, and the puzzles are correspondingly complex. Puzzle solutions unlock more puzzles and feed into "meta-puzzles" and sometimes even meta-meta puzzles to solve the hunt.
Puzzles are designed with the knowledge that people have access to Google, so there's usually more to it than simply figuring out what's being clued. In particular, there's usually a deeper puzzle beneath an easy-seeming surface puzzle, and hunt writers find clever ways to obfuscate music clips or images so they can't be simply searched.
Since there's no team cap, you can also ask anyone for help, because it's like adding team members which is acceptable. We ask friends with certain pop culture expertise for help all the time, and one puzzle had clues spoken by small children that none of my teammates could understand, so we asked our parents to translate. However, I feel it should still be the team doing answer extraction even if data is gathered from other sources, and posting on a forum of strangers for a solution feels like crossing a line.
As for scale: this year's hunt should be available with the other hunt archives in a few days, but I'll summarize in case you're curious. 2018's theme was Pixar's Inside Out, with puzzles occurring inside the head of Miss Terry Hunter (hence Miss Terry being the puzzle author; in reality Miss Terry is three people who will be credited on the Hunt solution page when it becomes public). The hunt began a relatively easy starter round (that still took my team the whole weekend) of solving puzzles that fed into (relatively easy for Mystery Hunt but still requiring some leaps) emotion metas. Then the hunt really picked up, with 4 differently-themed islands (Pokemon Island, where solving a puzzle would unlock an "evolved", more difficult version and solutions could be used in Pokemon fights; Games Island, where the puzzle answers filled in a Catan board to give meta clues; Sci-Fi Island, where each side of a cube contained a meta puzzle based on a different sci-fi property; and Hacking Island, based on locations around MIT campus and MIT "hacks" or pranks). Each island had metas and meta metas using the answers to the meta puzzles. The puzzle that this Listener was part of was on Games Island, which had a relatively slow 1 puzzles solved -> 1 puzzle unlock rate, so the high school team must have been desperate to unlock another puzzle or felt like one more answer would have helped them solve the Games meta puzzle.
If you have more questions, want to see the Hunt website before it becomes fully public, or (shameless plug) are interested in joining a team, even to solve remotely (my team could use some support on cryptic-style puzzles...), please feel free to email my team at readytostayinsideout [at] gmail [dot] com.