Deepbook minor doc update (#22136)

## Description 

Deepbook minor doc update

## Test plan 

Doc change only

## Release notes

Check each box that your changes affect. If none of the boxes relate to
your changes, release notes aren't required.

For each box you select, include information after the relevant heading
that describes the impact of your changes that a user might notice and
any actions they must take to implement updates.

- [ ] Protocol: 
- [ ] Nodes (Validators and Full nodes): 
- [ ] gRPC:
- [ ] JSON-RPC: 
- [ ] GraphQL: 
- [ ] CLI: 
- [ ] Rust SDK:

---------

Co-authored-by: ronny-mysten <118224482+ronny-mysten@users.noreply.github.com>

Author: tonylee08

docs/content/standards/deepbookv3.mdx

@@ -11,7 +11,9 @@ DeepBook does not include an end-user interface for token trading. Rather, it of
 
 ## DeepBook tokenomics  
 
-The DEEP token is used to pay for trading fees on the exchange. Future upgrades will allow users to pay trading fees using the input token, but owning, using, and staking DEEP will continue to provide benefits to active DeepBook traders on the Sui network.
+The DEEP token pays for trading fees on the exchange. Users can pay trading fees using DEEP tokens or input tokens, but owning, using, and staking DEEP continues to provide the most benefits to active DeepBook traders on the Sui network.
+
+As an example, governance determines the fee for paying in DEEP tokens, which is 20% lower than the fee for using input tokens.
 
 Users that stake DEEP can enjoy taker and maker incentives. Taker incentives can reduce trading fees by half, dropping them to as low as 0.25 basis points (bps) on stable pairs and 2.5 bps on volatile pairs. Maker incentives are rebates earned based on maker volume generated.