I tried the same method since my second week on Medium. The challenge for me was 3 comments per day (proper, well-thought-out responses). It’s not a new thing, in fact, it’s very basic and it works, but…
I don’t think it’s significant regarding views of your stories (not comments). On the other hand I’d recommend doing it along with every other marketing tool as well, in the end all adds up.
And yes, make a comment on any „popular” coronavirus post, or stories that went viral and your stats will blow up quick.
Thanks for sharing!