I'm pretty sure it lasts that long because some people get paid on a monthly basis and also it's just easier to organize yourself like that. Like someone might get paid on the first of the month, but if the sub period is only every 30 days, then they can miss a deadline to pay. And then on top of that, things would be out of order because not every month is 30 days long.
Good explanation, but I wasn't clear in what I was saying. What I meant was, is there going to be a space for those who do not at all in any way want to contribute to the comic/novel that they are reading. They hit subscribe and that's it. I guess the obvious question is yes.
You'll have to be careful with this since some people might flood episodes with one word comments just for some free points.