Are these meant to be rhetorical? You decide when you're going to stop calling it a startup. They are venture-backed and founded within the past decade. I'm going to call them a startup.
As for question number two, I'll let you count how many publicly-traded companies aren't profitable that have been around for decades.
I didn't register an opinion on whether SoundCloud should or shouldn't be profitable, I merely said what GAAS[0] requires an auditor to do.
[0] http://pcaobus.org/Standards/Auditing/Pages/AU341.aspx