"Once you're logged in, you'll be able to like/comment on my posts. These features haven't yet been added in just yet...but they will be very soon."
Yeah, it took me almost two years, but I finally did it. Both my main and development blogs now support comments. All you need is an account (which is super-easy to create) and you're good to go.
I also fixed a number of problems involving redirects and inaccurate view counts. Turns out, when I made my dev blog, I broke the view count system by sending all log info to the dev blog's database even if it should have gone to the main one. My bad. I spent 5 minutes fixing the issue and 30 minutes putting all the data back where it should have been in the first place.