So while your idea is nice it wouldn't work because not every company lhas the same recruitment process, frontend or backend (visible to the candidate vs workable for the recruitment teams)
I did see this in one example in the “who’s hiring” thread here, but also in following the newsletter for a startup I applied to.
Two reasons I saw in my last job hunt:
1. The company is lowballing wages.
2. The hiring manager for the position does not want to hire or is not aligned with the startup team‘s decision that they should hire for the role.
You can get good at qualifying for these scenarios early, but if you don’t have experience looking for and actively screening these out, a list of repeat posts might save some people time.
At least it might add weight to a possible dismissal.
So, not sure this methodology identify quite what you're looking for.
I’m sure there are other reasons companies would post each month: churn, or always on the lookout for strong talent, etc.