Another source of income could be online fin crime, perhaps in combo with a pool of human "goalkeepers" that recieve the scammed monies and funnel them to cryptocurrency.
Advance-fee scams such as the classic "Nigerian Prince" is formulaic enough that a LLM could run it successfully. Romance scams would probably work too.
If the NFT thing had hit a few years later, it would've been a good option too, and one that would've worked on ppl that were tech-versed enough to deposit cryptocurency directly, avoiding the need to recruit human goalkeepers.
Click fraud is another possibility.
In general, all online fin-crime that scams a large amount of ppl of relatively small sums tend to be repetitve and to some extent possible to describe as a flow-chart, and thus seems perfect for automation. LLM's would probably also be good at introducing continuous variations on the methods, to make them harder to spot.