How to give the role to the guest WordPress?
Could not find information on the Internet
And do not find the information... Because it is not entirely correct. It would be good to write a goal you want to achieve and we'll tell you more ability to adjust way.
You want for each unique user to create an account. Suppose that every day you have 1K uniques. In a month - 31K users... It will still need to clean the DB... the Role is not assigned to the guest. And about visits of bots and creating accounts for them, I generally keep quiet)))