Well, LRH's main motivation, at least starting out, was money (though he liked the worship), and Andy's seems to be worship (though he likes the money). I don't think he's capable of going outside fandom, tbh; all his "channeling" and writing and manipulations are directly tied to fandom. As far as I know, he hasn't even mentioned starting an original novel. I think/hope Andy's need for one-on-one adoration, and his parasitical dependence on the work of others*, is going to keep him in the little leagues forever.

*I don't think fanfic or fandom are parasitical by nature, but Andy Blake sure is.