I'm cautiously bullish too. Been planning to write a blog post about this, but I'm in the middle of finals right now. Anyway, summarised:
- They still have lots of growth potential in Asia, and other places as more and more of the planet comes online.
- Zuckerberg is a Gates-style evil genius. Being grey hat is bad for PR, but good for figuring out monetisation. (cf Twitter, loved by the Valley and make no money). He is also able to make painful changes that are widely mocked but turn out to be right (news feed etc).
- Facebook has lasted longer than the previous "hype cycle" for social networks. So it won't fall like MySpace, Friendster. (My theory: early SNs were mostly used by early adopters who get bored quickly. Facebook has crossed the chasm and the mainstream users aren't so keen to switch).
- Think of all the people who've said they're going to quit. How many have? Have you? FB has made a really, really sticky product; which again, goes back to the "grey hat" streak in the company.
- Finally monetisation. Display ads suck. But companies spend a ton on FB marketing (for pages and so on), and FB doesn't yet capture that value.
Ex 1: Facebook likes are now sold on the grey market. Ex 2: In Malaysia I saw graffiti promoting someone's FB fan page. Ex 3: Have you noticed how your local cafe/pub/restaurant now asks you to "like" them? I had a friend who got paid £500 to set up a Facebook page for a small business; sure, the business owner overpaid, but the point is that FB marketing is worth a lot to such companies. If Facebook can capture that value, they're set.
- There's also "black swan" revenue streams. A few years ago, who would have predicted virtual vegetables would have accounted for over 10% of FB's revenues? There might be more unknown opportunities like that in the future.
I still think the stock is risky, as there's every chance this won't happen. But, say Facebook does succeed as planned; I think one FB employee said they've only done 5% of what they set out to do. Imagine 10 years time: a guy in Kazakhstan buys his first smartphone. Activating the phone requires a FB account. His contact list is his FB friends list. Instead of SMS, it's FB chat. That's the scale I imagine Zuck is thinking at.
Admittedly, that's an unlikely scenario. But if it happens, Facebook could be worth two, three hundred billion, or more. Do a simple multiplication, probability times upside, and suddenly $70 billion might not seem like so much.
PS I'm glad Sebastian Marshall agrees with me ;)