I've tried a platform similar to this. Indeed has a product called Seen. I'm going to share my experience with Seen to provide insight.

Seen emails me saying employers want to talk, and included salary range in the e-mail body. Unbeknownst to me, the salary range was based on what I self-reported (many months prior), but based on the job title, it seemed too go to be true. Support had confirmed that the employer never saw my information, even though they sent me an e-mail saying the opposite.

Given the types of companies it tells me about, it's clear the product targets mid-market talent and not the top quintile. Which probably makes sense, since there are less people there. But it ended up having the same problem as InMail: an undesired signal-to-noise ratio. Sample size of 1, take my experience with a grain of salt.