There might be a few platforms that offer some free crypto earning opportunities without requiring a deposit or referrals, although they may have certain limitations or conditions. Keep in mind that the crypto space is often associated with risks and scams, so it's crucial to thoroughly research any platform before engaging with it. Some options you might explore include:

Faucet Websites: These websites offer small amounts of cryptocurrency for completing simple tasks or captcha. However, earnings are usually very low, and it might take a while to accumulate enough for a withdrawal.
Crypto Mining Pools: Some mining pools allow you to join and contribute your computing power to mine cryptocurrencies. While this doesn't require a deposit, it does require hardware and energy costs, and the earnings might not be significant without substantial resources.
Airdrops and Bounty Programs: Occasionally, crypto projects distribute free tokens through airdrops or bounty programs. Participating in these might not require a deposit, but it often involves tasks like social media promotion, content creation, or community engagement.
Crypto Gaming Platforms: Some gaming platforms reward players with cryptocurrency for playing games or achieving certain milestones within the games. These platforms might offer free tokens or rewards that can be withdrawn without deposits.
Remember to be cautious and skeptical of platforms that promise high returns or require sensitive information without a clear explanation of their business model. It's always wise to do your due diligence and consider the risks involved before participating in any crypto-related activities.