I didn’t see anyone post this above, but when colleges join common app, they agree to not preference any other application in their admission process. So, giving earlier notification to applicants who used the college’s own app, or having a higher admit rate via the colleges own app and the like would not be allowed.
For OP, I would encourage her to only use sources that are legit and fact based, avoiding things like those large, open facebook pages of parents with kids applying to college and the like. Reddit can have some good info, but it can be difficult to follow threads. And on any site, even CC, it helps to separate fact from opinion. It’s great to hear different opinions on certain things, but may not be helpful if that poster doesn’t know what they are posting about.