Systems and methods of classifying content items

A computer system for selecting content items, comprising:

• one or more processors;
• memory;
• and
• one or more programs stored in the memory and configured for execution by the one or more processors, the one or more programs comprising instructions for:
• providing a first content item to a first user of a service, wherein the first content item is selected from a plurality of available content items;
• determining an amount of time that the first content item is provided to the first user;
• adjusting content item selection criteria for a second user of the service, distinct from the first user, based on:
• the amount of time that the first content item is provided to the first user, and
• a number of times a user selects the first content item for playback;
• receiving a request for a content item from the second user;
• selecting a second content item, distinct from the first content item, from the plurality of available content items for the second user according to the adjusted content item selection criteria;
• and
• providing the second content item to the second user.

A non-transitory computer readable storage medium storing one or more programs configured for execution by one or more processors of a computer system to select content items, the one or more programs comprising instructions for:

• providing a first content item to a first user of a service, wherein the first content item is selected from a plurality of available content items;
• determining an amount of time that the first content item is provided to the first user;
• adjusting content item selection criteria for a second user of the service, distinct from the first user, based:
• the amount of time that the first content item is provided to the first user, and
• a number of times a user selects the first content item for playback;
• receiving a request for a content item from the second user;
• selecting a second content item, distinct from the first content item, from the plurality of available content items for the second user according to the adjusted content item selection criteria;
• and
• providing the second content item to the second user.