Content-modification system with feature for controlling viewer exposure to spoilers in advertisements

A non-transitory computer-readable storage medium, having stored thereon program instructions that, upon execution by a processor, cause performance of a set of operations comprising:

• receiving a request for supplemental content for use by a content-presentation device in performing a content-modification operation relative to a modifiable content-segment that the content-presentation device is scheduled to receive;
• determining that the modifiable content-segment comprises a promotional advertisement for a content series;
• in response to receiving the request for supplemental content by the content-presentation device in performing a content-modification operation relative to the modifiable content-segment and further in response to determining that the modifiable content-segment comprises the promotional advertisement for the content series, identifying content that the promotional advertisement spoils from the content series, wherein the identifying comprises comparing episode-specific fingerprint data from episodes of the content series to reference fingerprint data representative of the promotional advertisement;
• in response to identifying the content that the promotional advertisement spoils from the content series, and based on historical content consumption data associated with the content-presentation device, determining that the content-presentation device has presented less than a predefined threshold amount of the identified content;
• and
• in response to determining that the content-presentation device has presented less than the predefined threshold amount of the identified content, performing an action that facilitates the content-presentation device replacing the modifiable content-segment with supplemental content.

A computing system comprising:

• a processor;
• and
• a non-transitory computer-readable storage medium, having stored thereon program instructions that, upon execution by the processor, cause performance of a set of operations comprising:
• receiving a request for supplemental content for use by a content-presentation device in performing a content-modification operation relative to a modifiable content-segment that the content-presentation device is scheduled to receive;
• determining that the modifiable content-segment comprises a promotional advertisement for a content series;
• in response to receiving the request for supplemental content by the content-presentation device in performing a context-modification operation relative to the modifiable content-segment and further in response to determining that the modifiable content-segment comprises the promotional advertisement for the content series, identifying content that the promotional advertisement spoils from the content series, wherein the identifying comprises comparing episode-specific fingerprint data from episodes of the content series to reference fingerprint data representative of the promotional advertisement;
• in response to identifying the content that the promotional advisement spoils from the content series, and based on historical content consumption data associated with the content-presentation device, determining that the content-presentation device has presented less than a predefined threshold amount of the identified content;
• and
• in response to determining that the content-presentation device has presented less than the predefined threshold amount of the identified content, performing an action that facilitates the content-presentation device replacing the modifiable content-segment with supplemental content.