Null's Brawl vs. Phone Bill: Is it Pay to Win or Save Your Wallet?

So Null's Brawl tempts you with unlimited gems, letting you snag all the Brawlers and skins. But hold on, isn't that kind of the fun of the regular Brawl Stars - the chase to unlock your favorites? Plus, with Brawl Stars you aren't spending real money, just time and maybe some strategic saving of in-game rewards.