I prefer paying
"In the Silicon Valley era, '“I will give you a service and you will give me money for it” … is a quaint and unusual notion' – but, just maybe, people are reconsidering the trade-off"
I prefer paying over "free" (if the "free" comes with tracking as a condition, and paying doesn't). However, this article makes it sound like RCS is primarily a means by which companies would communicate with me. There's exactly no chance that I'll pay for that. I'll stick with plain old SMS, thanks.