So theres good and bad news.
Basically (take this w/ a grain of salt i cant exactly read japanese myself) for the time of around 2023 the paid plan was filled with a backlog of animations or whatever the dev made, but after running out of those they had to start working on the game and paid plan animations in tandem - some game development stuff they could preview, but some animations they made couldn't be added or something, meaning they were stretched thinner and thinner between the paid plan and the game.
I think the most obvious example is how they had to update the paid plan months later with the animations over the past year.
So going forward, it looks like they're removing the '1 enemy animation per month' thing from the paid plan to change it to just be more in-depth game dev details (no details on what that means exactly) in order to lessen the workload and allow them to focus more on developing the game.