Most people think of a referral code as a coupon. For a trading app, it’s something closer to a commission-only sales force. Every user who shares a code is doing customer acquisition, and the app pays them out of revenue it only earns when the new customer actually trades. For a growing business, that’s an unusually safe way to spend marketing money.
Why apps prefer referrals to ads
Paid ads cost money whether or not anyone signs up, let alone sticks around. A referral program flips that. The app pays nothing up front. It shares a slice of the fees a referred customer generates, and only for as long as that customer keeps trading. If the new user never makes a trade, the referral costs the app nothing at all.
Referred customers also tend to arrive with more trust. Someone who signs up because a friend, a forum post or a guide explained the product has already been “sold” on it, which usually means fewer abandoned sign-ups.
A real example: how Fomo’s model works
Fomo, the crypto trading app behind fomo.family, is a clean example because its terms are simple and public:
- Every user has a referral code, and the code is simply that user’s username.
- A new customer who signs up with any real code pays a lower trading fee: 0.45% per standard trade instead of the standard 0.50%. That’s a 10% discount on the fee, not on the trade.
- Fomo pays the owner of the code 25% of the trading fees the referred customer generates.
So the app gives up a slice of its fee twice: a discount to the new customer and a share to the person who brought them in. In return it gets a customer it didn’t have to buy with advertising.
Where code owners compete
Here’s the business twist. Because every genuine Fomo code produces the exact same 10% discount, code owners can’t compete on the discount itself. A code with a big number in its name doesn’t get anyone a bigger reduction from Fomo.
What some code owners do instead is share part of their own commission back. The Fomo referral code DEAL is an example: on top of Fomo’s 10% fee discount, the DEAL code owner returns 12.5% of the fees a customer pays, in USDC. That’s half of the 25% the code owner receives.
In plain numbers, a customer who trades $20,000 in a month would pay:
| Fomo fees | |
| No code (0.50%) | $100.00 |
| Any referral code (0.45%) | $90.00 |
| With DEAL, after the 12.5% cashback | $78.75 |
It’s the same logic as a broker rebating part of a commission to win clients: the margin is shared to make the offer stand out.
The one rule that trips customers up
For the model to work, the app has to know who referred whom, and Fomo records that only once: when the account is created. There is no field to type a code in later, and a referrer that’s already on an account can’t be changed.
That’s why the order of steps matters. A new customer should open the code owner’s invite link (or have the code ready) before creating the account, sign up with an Apple ID or Google account, and enter the code if a code box appears. The first standard trade then confirms it: a 0.45% fee means the code is on the account.
What businesses can learn from it
Three things stand out in the referral model:
- Pay for outcomes, not attention. Sharing revenue only after a customer trades keeps acquisition costs tied to real value.
- Keep the reward simple. One discount for everyone makes the offer easy to explain and hard to abuse.
- Let the community compete. When the discount is fixed, the people sharing codes compete on service: clearer guides, better explanations, or extra cashback.
For a trading app, that turns its own customers into a sales channel that scales with the business, and only costs money when it works.
Disclosure: not affiliated with Fomo. Code owners earn Fomo’s referral commission when customers sign up with their code; the DEAL code owner shares half of it back as cashback. Fomo sets its fees and referral terms and can change them. Not financial advice.
