We already noted that Taninaka, Shimoharada, Saeki and Yasukawa already have the ability to form pairs if they wanted to - they just have to bid at least 150 coins each time, which is possible if they exchange cards in the right order; this would ensure that it wouldn't be worthwhile for Kimura...
I disagree that we got zero progress in this chapter. In fact, Kimura just fell for Akiyama's plan hook, line and sinker, allowing Akiyama's team to make a profit of 81 + 85 + 89 + 102 - 150 = 202 coins this round. To see where this number comes from, observe that between Taninaka...
Here's my take on things. The minimum goal for the non-Harimoto side is for them to end the game with a total of 596 + 230 + 151 + 190 + 67 + 312 + 300 - 7*100 - 2*150 = 846 coins between them - this is their total profit if they manage to to exchange cards between themselves so that the five...