1. A method of incentivized advertising, the method comprising: providing an app for download via a network accessible app store and subsequently obtaining user registration information, the app configured to be downloaded to a computing device of a user equipped with a touch display and a separate web browser, the app configured to cause the computing device to at least: communicate over a network with one or more servers hosting ads, one or more systems hosting respective libraries of digital content items, including at least a third party library of content, and an application server, wherein communication over a network with one or more systems hosting respective libraries of digital content items further comprises communication with a third party system for a first plurality of digital content items in a library of digital content items and access, via an application programming interface (API), metadata from the third party system, the first plurality of digital content items including at least music or movie digital content, wherein the third party system offers the first plurality of digital content items for sale; provide a search user interface enabling the user to search the third party library of content items; at least partly in response to a determination that the user has provided a user search query via the search user interface, transmit the user search query over the network to the third party system via the API; receive over the network, via the API, search results resulting from a user search query of the third party library of content items, the search results comprising digital content items corresponding to the user search query; provide a user navigable listing of the digital content items corresponding to the user search query via the touch display, the listing including respective digital content identifiers, associated touch activated selection icons, and associated touch activated preview controls; access a preview having a pre-determined time length of a given digital content item from the third party system via the API in response to a determination that the user has activated an associated touch activated preview control; in response to a determination that the user has activated an associated touch activated selection icon for a first digital content item in the listing of digital content items corresponding to the user search query, enable a streaming video advertisement from an advertisement server to be streamed from the advertisement server and presented to the user via the user computing device and inhibiting the user's ability to fast forward through the streamed advertisement when presented to the user; after at least a portion of the video advertisement has been presented to the user, cause an engagement to occur between the user and a sponsor of the video advertisement at least partly in response to a user action, the engagement comprising at least one of a sponsor landing page engagement, a social media page engagement, or an email engagement; at least partly in response to a determination that the video advertisement has been presented to the user for at least an ad impression period, the ad impression period less than a full length of the video advertisement and a determination that the engagement, comprising at least one of a sponsor landing page engagement, a social media page engagement, or an email engagement, occurred, enable the first digital content item to be downloaded without digital rights management (DRM), at the user computing device over the network from the third party system.