I've been thinking recently. The ending was a little rushed, like they take months and months for each part and then suddenly the ending that they've been talking about as this "Book 5" type of thing is just basically a two update epilogue?
What if, Patreon caught wind of the Loli content they'd been putting out, like Slave Route Jinora, Love Route Ikki, Young Toph, and earlier content like the original Young Gwen from that proof of concept Ben 10 Omnitrixxx game they put out that had you dimension hop between Kim Possible and another world.
What if that is why they said they're going to scrub the patreon of all the links and everything and that Marty might do a continuation elsewhere? It makes sense since they're specifying the Ben 10 where Gwen looks far easier to argue is over 18.