Does Apple "withhold a part of the earnings for tax purposes" even for non-US developers? I've seen this related question but it's not clear what happens to non-US developers. There's a reference to a form "W-8BEN" but I don't understand it -- is this what I have to fill out when I'm non-US and I want to avoid Apple to withhold the tax?
I know for instance earnings from Dreamhost referral reward programs are only taxed for US citizens -- it is explicitly stated that for non-US people the full reward is paid out and they must handle the tax issue themselves. It's this kind of explicit statement that I'm looking for regarding earnings from the app store.