@Itachi uchhiha You are right. If the exchanges are not providing application level subscription figures, then not sure how these other websites are getting app level figures.
I think they are just throwing some junk data just to tell us that they have advanced tools.
For instance, one of the websites (mostly shared on our message board), is showing bHNI amount wise subscription as 55.82 & appwise as 11.17 for TBO IPO.
That does not just add up. Once BoA is out, we can cross check Indegene to get clarity.