I don't think this is a real scam, because the profit is so ridicule (less than 300 Euro per month). She could make much more just by providing a single update per year like many developers do. So as a scam is really badly made. I suppose she has got other issues that prevent her from producing any rendering. You can clearly see that she has skills both in the graphic and in the writing, this is a game that if continued could make her thousands Euros for months.
Her patreons are still giving money without any promise from Alishia, it's not like she's teasing them with previews or false promises, she is just being mute for ages. They could just stop financing her any moment.
We really don't know what happens in many people lives.
This post makes it abundantly clear that you have not been paying attention to this game or this developer, and that you have no idea as to what has happened in this case, so far.
On the subject of Alishia giving false promises, that's exactly what she has done, and she has done it multiple times. There have been multiple promised released dates which have come and gone, only to be replaced by new promised release dates, which also come and go. As for teasing previews, there have been some of them, as well, but only on her Discord server.
Now, it's entirely possible that Alishia had every intention of releasing the update each time she made a new promise. In fact, I'm pretty sure that this is the case. I don't actually suspect her of intentionally making false promises, and I don't suspect her of withholding the update in order to milk additional months out of her patrons. But it doesn't really matter whether that was her intent or not, because the end result is the same - nothing but broken promises and teasing for the last two years.
She may or may not have meant to rip people off. We don't know. I'm inclined to believe that it wasn't her intent. But it's nevertheless what she did.