Well, when you reach a certain amount of followers and/or subs you kind of just don't care anymore. Active or inactive, they're better than none. However, a balance is what you should be more concern about. People will revisit your work if they really like it, I'd say give it a couple years for your story to cook.
I used to do a lot of promotions back when I first started making comics, I will say they are still here till this day, the active and inactive ones. What matters is that you care about your work and it will show to the readers that you do. They are just like you and me, hard working people.