TBH I don’t think this has anything to do with money.
Right, you are just trying to make it easy for someone to tell you ‘sure’, that this is fine and normal over the phone as a way to judge how common it really is. They are probably more likely to do that if there are other tangential benefits.
If you call up 100 and no one says ‘sure’ then I would say that at least you know that they don’t talk about this to strangers over the phone. So it can’t be casually common or approved to the point they won’t tell rich strangers about it over the phone.
Freegards