Whatever, it's Destiny 2 for $12. It's an Activision published title available for just $12 being sold through Humble less than a year following its release. That might give you some idea of the current state of the game, despite of the game having a record breaking launch for Activision. It's also important to note that you're going to be locked out of a bunch of content if you don't also purchase the DLC expansions for the game. Right now, those aren't on sale.
You can still play through the base game's main campaign and whatnot. Just don't be surprised when you can't earn some of the higher level gear or access some of the other content that's currently in the game from the first expansion.