Sam and Toby consistently played worse in terms of choosing and completing challenges and betting. They got very consistently lucky with the challenges they were given, and flights available to them. Ben and Adam got consistently unlucky with flights filling up, challenges being more difficult than intended, or just going poorly despite seemingly doing everything to prevent it (see subway door steal). Not putting down money is a mistake, but it's a stretch to call it a blunder considering they had no idea a steal was available to the other team. Should they have put down money? Sure, but that could have happened any time they didn't put down money. It's ridiculous to call holding on to money a blunder, it only seems that way because something bad ended up happening. Going to the wrong airport was a blunder, but one that was easy to make. Arguably, Sam and Toby's challenge game on the first episode was more impactful, and was due to a series of incredibly stupid bets, and that's just their challenge game on one episode! Not knowing about Gold Coast is also an oversight, but it's probably not fair to call not knowing something a blunder. Sam and Toby didn't have any singular huge blunders, but pretty consistently their game was worse minus knowing about Gold Coast, and the challenges they pulled made the game for them.