I don't think they're saving money by making an HTML5 version. A slow app means less engaged users who are less likely to see or click on ads. At facebook's sca

I don't think they're saving money by making an HTML5 version. A slow app means less engaged users who are less likely to see or click on ads. At facebook's scale, that's potentially tens to hundreds of millions of dollars lost on the iPhone per year while it probably only costs a couple million to fund 5 engineers to make a decent native iOS app.