Since you call them "spam", I assume you do not want the emails you're getting, rather than saying you want the communication but they're lower quality than you want. If that's the case, I've been a GR member for years and only get emails from them when a particular author does something I've asked GR to notify me about. Implies to me that merely unsubscribing and managing your preferences seems to work.

I have a GR account due just to having a Kindle subscription and I don't use it and haven't configured anything (nor want to). Just for having the account I get emails like "the official adult site <some url> of Goodreads."

If there were some way I didn't have this goodreads account at all, that would be preferable.

You can turn that off in settings. I have and get nothing from them.

That's not the point.

I didn't sign up for a goodreads account. I was given one. And it's sharing my email address with third parties by default.

That's scummy company behavior.

> I was given one.

Huh?

Purchase a Kindle Fire. It comes with Goodreads preinstalled and cannot be removed. When you set up the device, it either asks you for your goodreads account or makes one for your amazon-linked email.