1539230: In my opinion, this sort of situation can be described by the line from the new Penalty Guildines under manipulting match outcome: "Manipulating outcomes of the match destroys tournament integrity. An undeserving person advances in the tournament at the expense of someone who should have legitimately advanced."
Personally I'd prefer to see the wording....
"An undeserving person advances in the tournament at the expense of someone who should or might have legitimately advanced."
in the manipulating match outcome policy. IMO if one conceeds to a friend / team member in order to advance them without opposition they've manipulated the tournament outcome and had intent to do so. This is quite different than one who conceeds because they feel they're already beaten or who doesn't wish to contine in the tournament. Here again as always it's important to look at intent.