Earlier today I read an article on the "Google sandbox", a supposed negative PR for every page on every website that is under "x" amount of days or months old (https://www.entrepreneurs-journey.com/189/google-sandbox/). This article claimed that the Google sandbox was a sort of anti-spam page ranking system that may or may not exist. Knowing absolutely nothing about SEO, the first thing that comes to mind for me are "churn and burn" sites that use black hat methods to get first page PR for a short amount of time before they get discovered and unranked. If a theoretical Google sandbox exists, it's definitely targeting these types. Here's my dilemma: last I checked, churn and burn sites still worked. In what I've read, some take longer to rank (e.g. 1 month versus 1 week) but they still work, right? Wouldn't the ability to still use black hat SEO to rank churn and burn sites strongly disconfirm the existence of a Google sandbox from a probabilistic standpoint? If a negative PR were attributed to every site under a certain temporal threshold, I can't see a plausible explanation for the existence of working churn and burn SEO methodoloogy. Do any experienced SEO'ers have anything to contribute? This is an open-ended question. Is there any line of reasoning that you think strongly confirms or disconfirms the Google sandbox hypothesis?