Hi Eric, thanks for the response.
It seems that to create a cohort from a CSV I would need to edit user profiles (the upload function is to modify profiles). I presume I would either need to modify a profile property, or create a new one (e.g. cohort_1), and then go to the cohorts section to filter for that property.
The way I’ve been doing it so far has been to copy a list into the filter section in the cohort builder, but that’s not always accurate, and in the past I’ve had issues with large cohorts (have to import in blocks).
Yes, an “import from csv” would be helpful as a part of the cohort builder.