The Internet has raised consumer expectations. "One step shopping (informing)" is not just a marketing ploy anymore, it is a justified expectation of the 21st century consumer. On the web, this feature belongs to B2C portals, these complex websites which offer exhaustive information about a certain topic, as well as related products and services.
Their purpose is to make the users faithful to them, so that the users in turn increase the portal's value.
Among other websites, TreeWorks created an informational portal dedicated to FOREX transactions (FOREXCentral.net).