Until recently, vblogger Catherine Harry was a Facebook success story in Cambodia. Then, on 19 October, Facebook tweaked its News Feed in Cambodia and five other small countries. Instead of seeing posts from Facebook pages in their general News Feed, users had to go to a new section called Explore Feed to see the content. And so when Ms Harry posted a new video on Facebook on Saturday, just 2,000 of her fans saw it in the first hour, compared to around 12,000 who used to watch it earlier.

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