Final answer:
The open-source version of MapQuest indeed provides API access and uses OpenStreetMap data, which is contrary to the misconception that it lacks API support. The open-source version differs from the commercial one, which may include additional services and support.
Step-by-step explanation:
MapQuest is a web mapping service that provides a variety of mapping and navigation tools. When discussing the open-source version of MapQuest, it's essential to understand what features and options it provides. One claim that is not true about the open-source version of MapQuest is that it provides no API access for developers. In fact, the open-source community benefits from the MapQuest API that allows for greater customization and integration into other applications. Developers often prefer open-source versions for the freedom and flexibility they offer in customization and development. Moreover, the open-source version of MapQuest supports the use of the OpenStreetMap data, which is a collaborative project to create a free editable map of the world. This contrasts with some proprietary services that use privately owned data sets.
However, one might mistakenly believe that the open-source version of MapQuest offers the same level of support and services as the commercial version. This is not the case, as the commercial version may offer additional features, enhanced support, and guaranteed updates that are not available in the open-source version. It's important for users to evaluate their needs against the capabilities and limitations of the open-source version to make an informed decision.