Consent is a key factor.
If you mail me an ad? Fuck you.
If I search out your service and find you? Okay. Though people game this system obviously. Google used to fight back against this but now they don’t care and even have just given in, allowing pay to play. So fuck that too
You can retrofit electric drivetrains to basically any car but it’s not cheap and takes a decent amount of research and expertise in fabrication