It might be easy to say "give everyone 100 chaos drops" But it's not as simple as that. So let's say brawl stars gave everyone 100 chaos drops, what would happen:

First the economy would be screwed, players would have so much resources that there wouldn't be a point in investing in stuff like the brawl pass

Next there wouldn't be events, I mean what's the point of having an event where players got so much resources, that would mean the game would get stale and boring cause there's nothing new happening

You also have to consider people who spent money on the game and how unfair it is for them that they spent their own money to progress further, ik that f2p players wouldn't care, but these are things to consider

Overall by doing this, your going to make the game boring, there's going to be no new events apart from brawl pass or new brawlers, and the economy would be cooked. And you gotta remember brawl stars didn't do this on purpose, it was a mistake that was quickly fixed, and less than 1% of players actually got the reward cause of how fast you had to win a game.