Predicting viewing activity of a posting to an activity stream

A computer system comprising:

• a processor, a computer readable memory, and a computer readable storage medium;
• first program instructions to transmit, from a first computer to a second computer, a new posting to an activity stream in the second computer, wherein the new posting is available for viewing to a potential viewer set;
• second program instructions to identify viewer information about one or more members of the potential viewer set;
• third program instructions to predict a viewing activity of the new posting by the potential viewer set, wherein a predicted viewing activity is based on identified viewer information about said one or more members of the potential viewer set, and wherein the predicted viewing activity describes a predicted likelihood of the potential viewer set viewing the new posting;
• and
• fourth program instructions to present, on a display coupled to the first computer, the predicted viewing activity of the new posting by the potential viewer set;
• fifth program instructions to determine that the activity stream in the second computer receives more than a predetermined number of new postings during a particular period of time;
• and
• sixth program instructions to, in response to determining that the new postings exceed the predetermined number during the particular period of time, reduce the predicted likelihood of the potential viewer set viewing the new posting;
• and wherein
• the first, second, third, fourth, fifth, and sixth program instructions are stored on the computer readable storage medium for execution by the processor via the computer readable memory.