Update with referral code

Author: Dan Forbes

docs/docs/guides/getting_started/quickstart.md

@@ -45,7 +45,7 @@ import { Web3 } from 'web3';
 
 [Providers](/guides/web3_providers_guide/) are services that are responsible for enabling connectivity with the Ethereum network. Web3.js supports [HTTP](/guides/web3_providers_guide/#http-provider), [WebSocket](/guides/web3_providers_guide/#websocket-provider), and [IPC](/guides/web3_providers_guide/#ipc-provider) providers, and exposes packages for working with each type of provider.
 
-The default constructor for the `Web3` class uses preferred RPC partner [QuickNode](https://www.quicknode.com/) as an HTTP provider to connect to [Ethereum Mainnet](https://ethereum.org/en/developers/docs/networks/#ethereum-mainnet). The default provider is subject to usage limits and is only suitable for initial testing purposes. To support Web3.js development and remove usage limits, use this referral link to sign up for a QuickNode account. Refer to the section on [Web3.js External Providers](/guides/web3_providers_guide/#web3js-external-providers) to learn how to configure the QuickNode provider to use an account token.
+The default constructor for the `Web3` class uses preferred RPC partner [QuickNode](https://www.quicknode.com/) as an HTTP provider to connect to [Ethereum Mainnet](https://ethereum.org/en/developers/docs/networks/#ethereum-mainnet). The default provider is subject to usage limits and is only suitable for initial testing purposes. To support Web3.js development and remove usage limits, use the referral code `WEB3JS` to sign up for a QuickNode account and get 20% off for 2 months. Refer to the section on [Web3.js External Providers](/guides/web3_providers_guide/#web3js-external-providers) to learn how to configure the QuickNode provider to use an account token.
 
 Web3.js is in compliance with [EIP-1193](https://eips.ethereum.org/EIPS/eip-1193), the Ethereum Provider JavaScript API, so any EIP-1193 provider can be used to initialize the `Web3` object.