I'm echoing what others are saying: no web version means I won't bother at all. My phone has access to multiple great browsers. Building a good lightweight web app means I can access the content from anywhere without having to deal with annoyances of push notifications or (as much) creepy tracking. My favorite example of a mobile web app is currently Twitter Mobile [0]. I even like using it from my desktop. It's very…
They are building a web version, they're just doing mobile first. And that may be a pretty smart move.
"You will work with our product designers, mobile engineers, and backend engineers to create a distinct web version of our mobile offering." (http://www.hello.com/en/jobs/)
Orkut was global, and in a global context, mobile devices may be more heavily used than laptop / desktop web.
"Smartphone ownership rates have skyrocketed in many countries since 2013. This includes increases of over 25 percentage points among the total population in large emerging economies such as Turkey (+42 points), Malaysia (+34), Chile (+26) and Brazil (+26)."
http://www.pewglobal.org/2016/02/22/smartphone-ownership-and...
Even in the US, I see all the kids with mobile devices and controlled internet access. If you're shooting for the next generation of people, e.g., the young'uns, then mobile first is probably critical.