> For example, the lightbox photo UI was panned as being confusing and slow, but brings in an extra billion (+5%) photo views a day [1]. If the interface is co

> For example, the lightbox photo UI was panned as being confusing and slow, but brings in an extra billion (+5%) photo views a day [1]. If the interface is confusing, then it sounds like those extra billion image views a day were probably accidental -- which would simply mean wasted bandwidth (and money) for Facebook. Unless those extra image views somehow also produced additional ad impressions for Facebook or something like that, then I'm not sure why they'd consider having to serve up more images a success if people were happier using the old system...