What a stupid answer to that question! (it gives more info - "You can set an expiry time by pressing the "Options"-button that's next to your uploaded file, otherwise your files will float in the clouds for as long as possible." - but it still doesn't really give any answer)
Well, in all honestly they can't really say "forever" or "indefinitely" because that is really an impossibility. How long is "forever" in your estimation? 10 years? 100 years? a thousand?
In all likelihood, the internet itself might evolve into something different in that time. This service might get bought out, or shut down, or the original founders may (fate forbid) get hit by a bus next week.
Setting any sort of indefinite limit is opening themselves up for legal action if it is even one minute less than someone expects. "As long as possible" at least is honest enough to say that as long as there is enough interest to keep the lights on, they will be there.
> As long as possible
What a stupid answer to that question! (it gives more info - "You can set an expiry time by pressing the "Options"-button that's next to your uploaded file, otherwise your files will float in the clouds for as long as possible." - but it still doesn't really give any answer)