Why, suddenly, does everybody need to know if I'm a robot or not?

I open an e-mail from a job search site and the first thing it asks when I click on the link to take me to the job they're alerting me to is if I'm a robot! WHY would that matter?
I go to a site where I can DL music after it converts the link into an MP3 and, before I can start the process, I have to prove I'm not a robot! WHY? What possible difference could it make? What if I WAS a robot and responded like a human to their query?

Why, suddenly, does everybody need to know if I'm a robot or not?
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