I've got another good anecdote.

I went in for an in-person interview at a company. At the end of the interview process, the interviewer let me know I hadn't gotten the job, but told me I should connect with him on LinkedIn because he and his friend had a great business idea that needed a developer.

I guess I shouldn't have been surprised, since I've had interviewers reach out to me after I've been rejected to say the same thing. It seemed exceedingly strange that I was solicited to work on another project in person by the interviewer during the interview process.