That had been the case for long. And google periodically reset their search algorithm purging billions of pages to clean up the junk. After which the results go

That had been the case for long. And google periodically reset their search algorithm purging billions of pages to clean up the junk. After which the results got better. But sometime back, it stopped doing it. Or can't do it anymore. Web-search is now up for disruption, when that happens.