This strikes me as very exploitative. Capitalizing on loneliness to enrich yourself gives me bad vibes (especially when the users of this thing will actually be worse off mentally in the end, as @cnnrduncan mentioned).
I have no doubts that for some users, it'll turn into a cycle. They'll feel lonelier each time they use it, which pushes them to use it more, and so on. Amouranth does nothing to protect these vulnerable users. I had the same feelings about Replika years before ChatGPT became a thing.