The one perk that I can think about of keeping up with an on-going series is that you can communicate with the author/join event that only happens at that specific time as the series go along. I found being active and talk to the readers on a daily basis helps a lot. Maybe also have some side contest/event going on. Like holding a raffle, open up Q&A, etcetc. I tend to binge read a series if the author does not actively communicate with their readers or do anything special and just post the comic when the update time comes.
Oh, also I tend to binge read a series if the author updates page by page 😂 Could that be the case with yours comic, I wonder...?