If you have a segment which is created with an 'in session' clause, Permutive will be unable to calculate the audience size. However, once you have set up the segment, you can see its growth in the analytics reports. After 30 days you will have enough data to report for an RFP response.
To receive an up to date estimate, the estimator will need to be re-calculated by manually pressing the 'Calculate' button at the bottom of your segment builder.
If you have any questions, please get in touch by contacting firstname.lastname@example.org or using the red live chat icon in the bottom right corner of your Permutive dashboard.