There can be only one monopoly in each domain by definition. In AI world it's more like several 'fortresses'. Together they ruin click economy. Which almost eliminated printed books and magazines. Well, attention is limited resource.
Generative AI still relies on the work of the creators whose livelihood it threatens for its training data. It still relies on someone else experiencing the real world, and describing it for them. It just denies them their audience or the fruit of their labour.
Someone here put it nicely: AI companies are eating their seed corn.