I realize this is a chicken-and-egg thing, but social media doesn’t work without scale. Blinkx makes some nifty video search technology, but why does it think it can launch a price comparison (only 200 stores) social shopping hybrid with no members, coupons, or apparent customer acquisition strategy? And what’s compelling about location-based service Gowalla‘s 450,000 users – scattered across at least 30 cities globally – for merchants or advertisers? Scale can be relative. Landmark Media used to talk about “in-market scale” – owning print and TV assets one city at a time. That’s one reason why Gilt Groupe’s SF acquisition makes sense.