Abstract: An example method includes obtaining user data from a first platform including item identifiers, first audience data including first audience interactions, and second audience data including second audience interactions. The method includes generating synthetic data for a second platform, distinct from the first platform, based on the first audience data and the second audience data. Generating the synthetic data includes selecting a set of the first audience data and the second audience data and a predetermined number of the item identifiers, and adding the predetermined number of the item identifiers to respective audience interactions of the set of the first audience data and the second audience data to form the synthetic data. The method further includes transmitting the synthetic data to at least one computing device and receiving engagement data responsive to the synthetic data.