I think some may have been like hidden immunity idols when they come back lol. I think just one is for the challenge itself. Kind of bizarre to be that loaded, but no one from Edge has a chance of winning, I just can't see it.
She had 14 tokens going into the "menu", but they never really showed us that menu. She bought an idol for Tyson and Peanut Butter. Everyone they showed having two tokens all bough an advantage, so we'll assume an advantage is 2 tokens. She said she got 3 advantages and stated "because that is all I could buy".
Her three advantages could be a the idol for Tyson, the PB, and the comp advantage. I don't remember how much PB was when Tyson bought it, but they've been changing up the prices anyway. I could see her buying three comp advantages for 6 tokens and having 8 left over for an idol and PB, but I don't think that is it. Boston Rob definitely had enough tokens the first time to buy multiple comp advantages if he was allowed, so I think they cap it at one.
Speaking of, I don't remember them showing us Rob saying anything about what he bought. I think they did show him saying that he still had his idol that he bought from before the first challenge, but they didn't say what else he bought since then. I'm fairly certain he had at least 3 if not 4 tokens. Didn't he get them all when they were just laying on the ground and he was able to snag them before everyone else?
Either way, from the preview it looked like the comp to get back in was one where they are attached to a rope that needs to be untangle by moving their way over/under a long wood structure. I'd imagine the advantage is being able to start a section or two ahead. I can't imagine that Natalie gets to jump to having one section left, but I do think she'd be good at this challenge anyway. She has been a straight up beast during the physical competitions on exile.
Side note, I think the only person who comes back that can truly change the game is Sophie. Even with idols, Michele is definitely next if she doesn't win immunity again. The other 4 can split the vote and flush the returning player's idol if they have one. Ben and Tony both have idols left, so it is going to take a blindside to get either out before final 4. But I think if Sophie makes it back in, Sarah takes her shot at Tony/Ben in a blindside with Michele and Sophie.