I still don't know if theses have been added but i'll still list them :
-The TC normally need ressources to prevent structures from decaying
-Use low quality fuel to power up helis / boats
-Boats (i've seen some on a serv)
-the research tables (not only to just store experience)
-blueprints
-the use of scrap metal (not only for trades in safezone)
-loot the crates (and not breack them)
-remove proning
-vending machines placed by players // an interactive shop beetwen players