Some questions do not need a call. Should you take the offer. Is this stack worth learning. Why did that interview go badly. Is your manager's feedback fair or is it a signal to leave.
Send one question with enough context to answer it properly, and you get a proper written answer within two days. Not a one liner, and not a link to somebody's blog post.
If your question turns out to need a real conversation rather than a written answer, I will tell you and refund this.
Best for: a single specific question you have been going back and forth on.
Not for: resume feedback or anything that needs me to review a document. Those have their own listings and this will not do them justice.