Spotted two interesting links today.

In the first, The Guardian says that Facebook now has 350m users – and there’s no point in advertising to them.

The premise is that in spite of having a massive userbase, one that is now larger than the population of the USA, Facebook is struggling to extract financial value from their audience.

The second link is a Silicon Valley Insider interview with LinkedIn CEO Jeff Weiner, in which he claims that LinkedIn is still profitable with ad revenues up 50%.

LinkedIn has 3 main revenue streams, with online advertising being only one of them.

Weiner doesn’t give any breakdown, but implies that a significant portion of LinkedIn revenues are generated by their premium subscription business and corporate recruitment solutions.

I blogged this week with a throw-away thought that LinkedIn could possibly be built today as a Facebook application, but now I’m not so sure… it’s clear that LinkedIn have managed to build a profitable business quite different to the type of business that could be created inside Facebook’s ecosystem.

What do you think? Will Facebook become super-profitable?

Related posts:

1. What if LinkedIn was a Facebook app?
2. Farmville vs. LinkedIn