

They put a lot of work into the repacks to make them as small as possible. Generally compression algorithms are chosen with a balance between compression and cpu requirements. Repackers don’t care about that. They make them as small as possible with every trick known to man.
And if the algorithm used can be decompressed with all available cores in parallel it’s great as well.
I’m reminded of when my boss asked me whether our entry test was too hard after getting several submissions that wouldn’t even run.
Sometimes prospective employees are just shit.