I'm not sure if this will answer your specific questions, but I found this HN comment from a few months ago to be some very interesting background: https://new

I'm not sure if this will answer your specific questions, but I found this HN comment from a few months ago to be some very interesting background: https://news.ycombinator.com/item?id=26931498 https://news.ycombinator.com/item?id=26931498