Hi! While I am not sure I fully understand your use case, I don't think
you are missing anything. This kind of analysis / segmentation /
calculate metric is not really possible with the product variable. This
is because the product string is a 'list Variable'. A segment pulls back
the whole product string when at least one product matches the segment.
So, there is not really a way to say 'THIS, but NOT THIS' in a product
string. For example, if you had a product string of: "ProdA, B-Product"
-A ...