> you get your money as a subscription instead of a one-time thing. The second part is REALLY important.
I agree that this is often good. Especially for some types of creators. However I think a lot of people have abandoned the store model when it would suit them well. For example I run a lot of RPG campaigns and like to grab maps often from people on Paetron. However often I only need a couple of maps for a specific campaign or one specific map that I like from the backlog. I think you can usually subscribe for one month and grab what you need, but Paetron doesn't make this obvious and it is certainly awkward. I have no interest in subscribing to an artist whose next map is likely not relevant to my campaign. If these people had stores I would be buying maps frequently, but they don't so I pass them by.
If you are making content where most of your audience is going to appreciate every post (for example producing entertainment or information) then the subscription makes a lot of sense and is hugely valuable. However I see this model being used even where a substantial portion of the potential audience likely has interest only in a small section of the work and I suspect that choosing only this model is closing off potential additional income.
I can see why Paetron doesn't offer setting prices for individual posts or similar, the subscription model is lucrative when it works. However there is definitely a missing piece in some situations.