I think XP should be given to a player if their zipline is used by their team mates. It would give more incentive for players to build ziplines to help their team progress rather than only using it for reaching sniping areas. To prevent XP abuse, limit the xp to just once per zipline, meaning if someone uses it like 4 times the player who put the zipline down only gets xp once per life. I feel like this way it can show how much a recon helps their team properly.