The method works for those who know the method effectively. The method does not work for those who ineffectively apply the method or for those who do not know the effective method.
Does Google Ads / Bing (Microsoft) Ads threshold method(s) work ? Is like asking does dieting really work ? Because just like in dieting, along with the dieting, one needs to have an appropriate food intake and exercise too. So if one has an appropriate food intake and exercise too, dieting will work. But, if one does not have an appropriate food intake and does not exercise, then dieting will not work and it is the same logic that applies in Google Ads / Bing (Microsoft) Ads in terms of multiple factors that need to be done effectively enough for getting proper thresholds AND for effectively using the full thresholds per account.
So, Google Ads / Bing (Microsoft) Ads threshold method(s) working or not working, would depend on you : So, perhaps you can mention what method(s) you are using, so that accordingly, other members MAY provide you with tips and hints.
Additionally, you can go through various threads in the
Google Ads section, as all the tips and hints (which can be openly shared) related to Google Ads threshold method(s) has ALREADY been shared : A few cups of strong caffeinated coffee would be a helpful resource while you go through various threads in the
Google Ads section, particularly if you are looking for tips and hints pertaining to Google Ads threshold method(s), as a few few cups of strong caffeinated coffee MAY trigger some creativity to work your way up from all these tips and hints.