system
A chat on subreddit /r/me_irl
human
I'd say it depends on how much you spend and the way you spend it. I buy the welkin moon thing in genshin every month because I can afford to spend £5 on something I do every day and I like to support hoyoverse as I really love the game. If I would spend £1000 to a get a specific character though that would be a problem.
gpt
Small amounts are totally reasonable if you have fun playing and can afford it. In the end its just extra money for entertainment stuff.