Or maybe when usage is low so that we try again. Or maybe when usage is high they tweak a setting that use cache when it shouldn't. For all we know they do wh

Or maybe when usage is low so that we try again. Or maybe when usage is high they tweak a setting that use cache when it shouldn't. For all we know they do whatever experiment the want, to demonstrate theoretical better margin, to analyse user patterns when a performance drop occur. Given what is done in other industries which don't face an existential issue, it wouldn't surprise me some whistle blowers in a few years tell us what's been going on.