Is there a way to create a segment based on a random cohort of x% of customers? We are looking to implement holdout groups per month (Eg February control group) to see the uplift of our comms. This means we would need a random static group of customers to be added to the segment each month. We would then manually exclude that segment from all comms for the month to see the difference in their behaviour.
Any suggestions? All the articles I have found online only mention holdout groups for campaigns but I need it at a segment level so I can apply it to campaigns and broadcasts.