I think this comment in particular from the thread you made about a month ago had a lot of wisdom to it:
The way that you update is more or less fine as far as PC readers go (especially the banner at the bottom informing people that it updates fridays
) but! It's not a good way that promotes more activity (if that's what you're aiming for). As is, regardless of how many times you update the episdoe, people can only "view" it once, like it once, and are unlikely to leave several comments in the same comment section. If the 3 updates had been posted separately you might have 3x all of those numbers. And most importantly "you're not gaining new eyes because you're not appearing in the fresh section".
That said! I feel like this method could still be effective, but you'd have to be much more aggressive with your external advertising xD I'd be plastering links all over places like reddit/social media each week when your comic updates and what not (which is a good thing to do regardless, but especially for this update style). And the occasional promo thread like this on the forums doesn't hurt either 
Anyhoo, I'm a big fan of MM, can't wait for the next update~