Hi @Vince AVP,
Thank you for sharing this question with the Klaviyo community.
Our product block feature doesn’t randomize its selection of products per individual, bur rather, it will show items based on the previous purchases of your recipients. If the recipients did not purchase any of the items from the feed, then it is expected that the items shown will be the same for each person. For example, if user A has never purchased, the product block displays items 1,2 and 3. If user B has never purchased, the product block displays items 1,2 and 3. If user C has purchased item 1, the product block displays items 2,3 and 4, and so on.
For more information, I recommend checking out our article on product blocks.
I hope that is helpful!