I think it depends on what you mean by relationship. I've been listening to the same morning radio show for 20 years or so and I feel like I care about the host

I think it depends on what you mean by relationship. I've been listening to the same morning radio show for 20 years or so and I feel like I care about the hosts even though they don't know I exist. On the other hand, many of the podcasts I listen to I am able to be in their chatroom when they record and can have an actual back and forth. I think they recognize my name so that is a real relationship even if it is a tenuous one.