Why would you go for Scandinavia?
first turn bonus, means you have a 3 income advantage on turn 2, if you are countering your opponent that next turn (as you could easily be doing in africa / south america or indonesia), it can give you enough income to break through their main income source or safely get your second bonus while putting pressure. europe is not very optimum expansion territory as a third bonus, so in this layout it might not be the best option but that also means you could be surprising your opponent with early income while he risks finishing a bonus and you're already hammering his border. if your 3rd pick is between two bonuses of your opponent it doesn't matter as much if you take a few extra armies to finish your third bonus since you will most likely be taking one of your opponents' bonuses, or force them to play the blockade card while you are free to expand into europe and then greenland and caucasus.