Please patent everything about this app! Patent the whole "tune AI to sell relevant products" methodology. Aggressively sue anyone who uses your IP. Set up a go fund me or something to cover your legal costs, alternatively sell a licence to use the IP to one of the major AI houses(but not all of them, please not all of them).

Set up an estate to protect this IP until 70 years after your death. After that I guess we're doomed, but we'll have had a good run of it until then at least!

Patents don't last that long, FYI. Other types of IP do, as Disney has profitably demonstrated/lobbied.