You make solid points, but just as people's attics become cluttered with crap that they never use but are reluctant to throw out, I think you could argue users innately feel the same with their personal photos / friends / posts on FB.

I was confused about downvotes because I was at -2 for awhile (maybe I offended snapchat employees ;), but I appreciate you rebutting me. I do believe if there was to be a huge contender to Facebook, it would need a messaging component to grow out of. However, I still do not believe FB made the purchase primarily out of fear of competitive threat. I think FB Integration in a tencent model can make them more money than FB ads (while driving more targeted FB ads).