Although, it's an strange move on their part not to immediately release at least some of these features. I'd have thought that the initial confusion or lack of

Although, it's an strange move on their part not to immediately release at least some of these features. I'd have thought that the initial confusion or lack of clear product differentiation would have turned users away who might not come back when Kik releases more interesting features. What explains their virality? Maybe the S-D-R thing is good enough for an initial hook?