Other Rogue messing with their friend cards like "You owe me one!" and Untimely Transaction only reveal the target after having played it (unless your table play with open hand information) and you or they might not want to do anything, wasting the card and action.

For this one you can clearly see everyone's resources before using it and plan with your own hand accordingly. You can even ask them nicely if they are going to use the resources or they need more resources or not, without saying the card out loud. (Close to Teamwork when deciding to play). The reason this one is a Gambit I think it is because it involves unadjustable 0 resource for both investigators.

• Next round you have 0 resource as you must also give away your Upkeep resource. Fast cards that have cost are not usable to react to Mythos Phase. (e.g. Lucky!, Sure Gamble.)
• If intention is to give more resources, the target must play with 0 resource for the remainder of the round. So you might have them play first, and ask whether they are planning to play Fast card with cost in Enemy Phase or not.

Or you are trying your luck with other cards, using the gained resources on cards that need a test in order to gain back more and not getting it. (e.g. "Watch this!", High Roller, Parallel "Skids" O'Toole)