Most of the visitors are still coming from the US

Indeed, as Paul Graham rightly notes, the only thing essential to a startup is growth.

“It's hard to find something that grows consistently at several percent a week, but if you do you may have found something surprisingly valuable. If we project forward we see why.

A company that grows at 1% a week will grow 1.7x a year, whereas a company that grows at 5% a week will grow 12.6x. A company making $1000 a month (a typical number early in YC) and growing at 1% a week will 4 years later be making $7900 a month, which is less than a good programmer makes in salary in Silicon Valley. A startup that grows at 5% a week will in 4 years be making $25 million a month.”

If growth is such an important matter, then surely, we should be constantly monitoring it. After all, what gets measured, gets managed.