There are other avenues of income. You can invade other industries which are slow on AI uptake and build an AI-from-ground competitor with large advantages over

There are other avenues of income. You can invade other industries which are slow on AI uptake and build an AI-from-ground competitor with large advantages over peers. There are hints of this (not AI-from-ground but with more AI) with deepmind's drug research labs. But this can be a huge source of income. You can kill entire industries which inevitably cannot incorporate AI as fast as AI companies can internally.