There are a few legitimate ways to earn free $BNB

* Binance Learn & Earn: This program offers interactive courses and quizzes about cryptocurrencies, including BNB. Upon successful completion, you'll receive a small amount of BNB as a reward.

* Binance Referral Program: Invite friends to join Binance using your referral link. When they start trading, you'll earn a portion of their trading fees as BNB rewards.

* Binance Competitions and Giveaways: Occasionally, Binance hosts contests and giveaways where you can win BNB. Keep an eye on their social media channels and announcements for these opportunities.

* Binance Savings: While not directly "free," you can earn interest on your BNB holdings by depositing them into Binance Savings. This allows your BNB to grow over time.

Remember:

* Be cautious of scams: There are many fake websites and social media accounts claiming to offer free BNB. Always double-check the authenticity of any such offers.

* Limited availability: Free BNB opportunities may have limited availability or specific eligibility requirements.

By exploring these legitimate methods, you can potentially earn some free BNB on Binance. However, it's important to approach these opportunities with realistic expectations and prioritize your account security.