Abstract: Methods, systems, and storage media for assigning multiple identifiers to user accounts are disclosed. Exemplary implementations may: receive an indication of an event; associate the event with a user; associate the user with at least a first account identifier of a plurality of accounts of the user; associate the user with at least a second account identifier of the plurality of accounts of the user, the second account identifier different than the first account identifier; add at least one of the first account identifier or the second account identifier to a custom audience relating to the event; target the custom audience through directed advertising; and deliver advertisements to the custom audience.

Abstract: Methods, systems, and storage media for dynamically modifying ads at point of display based on target user are disclosed. Exemplary implementations may: receive a plurality of visual content items; receive information indicative of a user preference associated with a user device; determine a type of visual content item to deliver to a plurality of user devices; determine, based on the type of visual content item and the information indicative of the user preference, a subset of visual content items of the plurality of visual content items; select, for the user device, a visual content item from the subset of visual content items; modify, based on the information indicative of the user preference, a graphical quality of the visual content item to output a modified graphical quality; and send the visual content item with the modified graphical quality to the user device.