Making 100 USDT on Binance without any upfront investment typically involves utilizing opportunities like promotions, referral programs, or earning through Binance's various services. Here are a few ways you could potentially achieve this:

### 1. **Binance Referral Program**

- **How it works**: Binance offers a referral program where you can invite others to join Binance using your referral link. You earn a percentage of the trading fees that your referrals pay.

- **How to do it**: Share your referral link with friends, family, or online communities. If they sign up and start trading, you earn commissions from their trades, which can accumulate to 100 USDT or more over time.

- **Note**: This depends on how active your referrals are in trading. The more people you refer and the higher their trading volume, the more you can earn.

### 2. **Binance Earn (Staking & Savings)**

- **How it works**: Binance offers various ways to earn passive income, such as staking or flexible savings. Some of these programs allow you to earn interest or rewards for holding certain assets.

- **How to do it**: If you already hold any assets in your Binance account, you can use them to earn passive income. Look for special offers in the "Binance Earn" section that might allow you to earn more USDT through staking or savings. Some of these programs might not require a significant initial investment.

- **Note**: You would need to already have some crypto to participate, so this doesn’t technically meet the “no investment” criterion unless you have assets on the platform already.

### 3. **Participating in Binance Promotions & Giveaways**

- **How it works**: Binance occasionally runs promotional campaigns, giveaways, or trading competitions where users can earn free USDT by completing specific tasks, such as trading a certain volume, participating in quizzes, or joining special events.

- **How to do it**: Check the “Promotions” page on Binance to see if there are any ongoing events or campaigns where you can win USDT. Binance also sometimes offers airdrops or free tokens as part of promotions.

- **Note**: Some promotions might require you to make a trade or complete some other tasks, but others may be free to join.

### 4. **Binance Launchpad and IEOs (Initial Exchange Offerings)**

- **How it works**: Binance Launchpad is a platform where new crypto projects are launched. Sometimes, you can participate in a token sale for these new projects and receive rewards in the form of tokens that can be traded for USDT.

- **How to do it**: Look out for Launchpad offerings where you might be able to earn tokens for free, either through rewards or incentives for participation. Some projects might even offer small bonuses to early users or to those who complete simple tasks.

- **Note**: You will typically need to hold a certain amount of BNB (Binance Coin) or another qualifying asset to participate in the sale, but occasionally, there might be free promotions.

### 5. **Airdrops**

- **How it works**: Airdrops are when a cryptocurrency project distributes free tokens to holders of a particular coin. Binance sometimes supports airdrops for projects launched on their platform.

- **How to do it**: Stay updated on any airdrop announcements by Binance. If you have a certain amount of supported coins in your Binance wallet, you may automatically receive free tokens, which you can later trade for USDT.

- **Note**: Not all airdrops require you to hold large amounts of assets, and some are open to anyone who meets the minimal requirements.

### 6. **Binance Academy and Learn & Earn Programs**

- **How it works**: Binance Academy, the educational arm of Binance, occasionally offers "Learn & Earn" programs where you can watch educational videos or take quizzes and earn crypto rewards, including USDT.

- **How to do it**: Check out the "Learn & Earn" section on Binance Academy for current offers. These programs often don't require an initial investment and can be a way to earn small amounts of USDT over time.

### 7. **Binance Smart Chain (BSC) DeFi Opportunities**

- **How it works**: You could explore decentralized finance (DeFi) on Binance Smart Chain (BSC) to earn rewards through yield farming or liquidity provision. Some platforms offer a "no-investment" model through bonus incentives or staking rewards.

- **How to do it**: Engage with decentralized apps (dApps) on Binance Smart Chain. Many projects may offer free tokens to new users, or you can earn small rewards by providing liquidity to decentralized exchanges (DEXs) on BSC.

- **Note**: DeFi strategies often come with risks, so proceed cautiously and do thorough research.

### 8. **Trade Crypto for USDT (Using Promotions)**

- **How it works**: Binance often runs trading competitions where you can win prizes, including USDT, by trading specific pairs during a promotional period.

- **How to do it**: Look out for trading competitions and complete the necessary trading volume to win a share of the prize pool, which may include USDT. You may also receive rewards for hitting certain milestones.

### Final Thoughts:

Earning 100 USDT without investment requires leveraging opportunities like referrals, participating in promotions, or earning passive income through various Binance services. While some methods might take time to accumulate 100 USDT, being proactive and staying updated with Binance’s ongoing programs will help you achieve your goal.