Yeah, same hack, sorry I posted a screenshot and not the actual hack link.
Well just for the sake of the discussion, here's another "anti-bumping" hack:
https://vborg.vbsupport.ru/showthread.php?p=915651
That one auto-expires (ie: closes) a thread after a pre-determined period of inactivity.
In reading your last post though I see that doesn't accomplish what you want. The "classified ad" example is a good one. You want their post order to be preserved, so replies don't actually "bump" the thread. Makes perfect sense, in fact, that should be a standard option for some forums. I could see it coming in handy or even being necessary for some applications. Just haven't seen anything like it for vB (yet.)