Spammers are probably not targeting you. Like the obvious comma and spelling mistakes in spam emails that are there to weed out the smart people that are much harder to scam, this also serves as a filter to get only the most vulnerable people.
Don't tell the call spammers this or they'll train all their "agents" to start phone calls with "what's up, bro" or something they think is the stereotypical opposite of formal.
The second one is almost always used by Healthcare companies in my experience, in a backwards attempt at HIPPA compliance.
They want to make sure they called the right person. Except they know everyone hates getting called like this, so they take "who is this?" as affirmation and then proceed to tell you their company and the call.