It’s behavioral intention vs. satisfaction. Another reason for why the NPS correlations with growth were nominally higher is because the NPS is a measure of behavioral intention (likelihood to recommend). In contrast, the ACSI is a measure of attitude. While attitudes do predict behavior, they tend to predict behavior through behavioral intentions. This idea is also supported by Pollack & Alexandrov (2013), who argue that satisfaction can be seen as an antecedent to repurchase intentions.
Worldwide spending on customer experience (CX) technologies will total $508 billion in 2019, an increase of 7.9% over 2018, according to the inaugural Worldwide Semiannual Customer Experience Spending Guide from International Data Corporation (IDC). As companies focus on meeting the expectations of customers and providing a differentiated customer experience, IDC expects CX spending to achieve a compound annual growth rate (CAGR) of 8.2% over the 2018-2022 forecast period, reaching $641 billion in 2022.