ROI is not the only key performance indicator (KPI) that you need to track that you need to measure while consiering your Crm. There are other crms such as sales Crm, Collection Crm andCustomer Service Crm for which Various other KPIs you must track include data that measures your internet marketer scores (NPS), customer purchase expenses (CAC), size of sales cycles, advertising campaign performance and email circulation list development.ROI is not the only key performance indicator (KPI) that you need to track. Various other KPIs you must track include data that measures your internet marketer scores (NPS), customer purchase expenses (CAC), size of sales cycles, advertising campaign performance and email circulation list development.