Ok, talked with @mikewilli and we determined that the exposure signal ignores the data source's experiments_column_type parameter. So any values are valid here when used as the exposure signal but if this data source was used for a metric, then it should validate and error.
Ok, talked with @mikewilli and we determined that the exposure signal ignores the data source's
experiments_column_typeparameter. So any values are valid here when used as the exposure signal but if this data source was used for a metric, then it should validate and error.