These don't sound like serious inquiries. Have you been approached by a partner at a VC firm or a executive at the Megacorp? This sounds more like due diligence

These don't sound like serious inquiries. Have you been approached by a partner at a VC firm or a executive at the Megacorp? This sounds more like due diligence against other investments they are considering by having low level folks reach out to see what they can uncover.