"While RCS/ RCS-e enables mobile operators both to evolve mobile messaging beyond SMS and MMS and keep operators relevant in mobile messaging, it will not offset the current decline in messaging revenue. We forecast that by 2017 there will be just below 180 million users of RCS/ RCS-e based services. However, RCS/ RCS-e messaging will contribute little direct revenue for mobile operators. To offset lower consumer spend levels, carriers should aim to tap opportunities such as mobile marketing, or increase innovation by opening up SMS platforms to businesses and the developer community"
See "Operator Messaging Revenue to Decline 20 percent by 2017" - here.