By the powers vested in me, this post indicates that I am following Malcolm Blaney's Indieweb Planet, so that the Planet follows me back. Gazounds!
[Edit: it appears that the Planet has reached its subscription limit. Curses!]
[Edit, 2020-02-06T16:53:56-0800: Discussion with Malcolm on IndieWeb chat shows that I was mistaken about the subscription limit. His Planet has successfully subscribed to this website. Baboosh! Mission Accomplished! And it even exposed a bug on my site: I'd somehow deleted the rel="feed" link in my HTML <head> tags, which is how subscribers to this website know to retrieve posts from the blog.]