Subscribers to Rich Communications Suite (RCS) services will reach 15 million by 2013, according to a report by market research firm Infonetics Research, which also forecasts that RCS service fees will net operators US$1.6 billion between 2012 and 2016. However, directing analyst for VoIP and IMS for Infonetics Research, Diane Myers, said the technology remains a niche concern. Operators in Spain recently pledged to make RCS software available in their handsets in the first half of this year.