Various methods and systems are disclosed to provide dynamic content to users of online payment service providers without requiring users to log in or otherwise actively engage the payment service providers. In one example, a method of providing dynamic content includes providing a client device with access to an online marketplace over a network. The method also includes facilitating transmission of a user identifier stored by the client device to a payment service provider. The method further includes receiving dynamic content from the payment service provider in response to the user identifier. In addition, the method includes serving the dynamic content to the client device over the network.