That could easily have been a random ad, combined with something like the Baader-Meinhof phenomenon.
To be a scientific test it needs a list of products, and then randomly assign half into a study group and half in to a control group. Then talk all the time about stuff in the study group but not the control group. And see if there is a statistically significant difference between the ads shown for products in the study group vs the control group.
To be a scientific test it needs a list of products, and then randomly assign half into a study group and half in to a control group. Then talk all the time about stuff in the study group but not the control group. And see if there is a statistically significant difference between the ads shown for products in the study group vs the control group.