It’s OK for people to spend as much money as they want supporting a game. If you enjoy the work that a developer does for a live service game, it makes sense to fund their business.
I paid for a couple of the cosmetic packs in DRG for example. They genuinely made a great game, and they released additional content as well. I like that I’m not pressured into a subscription, and I can choose how much extra money I want to throw their way.
Destiny 2 is a bit ridiculous in my opinion. The DLC is very expensive, each pack corresponding to the cost of a full game, and there are several of these packs at least. That being said, some people really like Destiny 2. Who am I to say that their spending is wrong? It’s their hobby, and they’re funding it by supporting the company that makes the content for them.