Why on Earth do we get a time penalty on conceding?

It is just to annoy players, isn't it? Because there is no other functionaility to it.

It won't prevent certain people with a certain mindset to play a fake matches with a mate as that player just needs to switch toon while rank system is on account.

It won't prevent these people to play fake matches with a second account as the second account can just switch toon.

So it won't even prevent the sole function that one could imagine that it might serve a higher purpose.

And it won't prevent people from conceding a match that they have already lost at turn 3 due to the exponentially snowball nature of that card game.

So a dev please enlighten me what the hidden reason there is to have a time penalty on conceding that only annoys people.

If you want to prevent at least some parts of fake matches it would be much better to block during 10 minutes or so players to play against the same player. If match maker tries to pitch the same players within 10 minutes from the last match just put back both players in the waiting queue. This would at least also prevent to play several times the same player again for other players who don't want that.