@KeeperBvK That's probably because you're not logged in to Twitter. It has nothing to do with the developer. I can see the codes. There is no point complaining about the game developer.
Daily codes are shared on Twitter, which you can access via the link on that page. It literally says codes are shared daily and gives you the links there and people ask where the codes are repeatedly. Can people read?
Support units' damage grows faster and surpasses HQ upgrades after a few privatizations. At first, it'll be most HQ upgrades that gives you the most damage. For those who are curious.
 "War Clicks"){kind=icon}
 "RPG Shooter: Starwish"){kind=icon}
 "Kingdom Rush"){kind=icon}
 "Monster Arena"){kind=icon}
 "Bullet Heaven"){kind=icon}