Thanks for responding, James.
1. I do need or want new subscribers, because I do have a blog, and subscriber numbers do help if I want to submit to be paid for instructional or review posts. I don’t believe I have any “functionality” which requires that, though. I do have Mail Chimp set up to handle new subscribers, and to post any new posts I create.
2. I just went into Settings-General. I did have “Anyone can register” checked. I just UNchecked it. Is that what you think I should do? Will unchecking that box mess up my Mail Chimp set up?
Again, thank you for your answers and suggestions.