Crown Coins Giveaways

Why does CrownCoins allow a female streamer to require her audience to gift subscriptions before entering her giveaways? This setup forces viewers to donate to her before having a chance to win, which comes across as exploitative. Given the significant funds already in her account, she doesn't seem to need the extra money. Shouldn't giveaways be a way to give back to the community rather than a method to generate more income? The other streamer doesn't do that.