Goods A and B are economic complements if, when the price of A goes down, demand for B goes up.
LLMs are not complements to social media platforms. There is zero evidence that if "the price of LLMs goes down" then "demand for social media apps go up".
This is a case of commoditizing the competition but that's not the same thing.
Commoditizing your complement:
- All-inclusive resorts. Restaurants are a complement to hotels. If food is free I might go on vacation more.
- Smartphone app-stores. Apps are a complement to phones. If apps cost $0.99 there will be more demand for iphones than if apps cost $20.
This is Zuck being an absolute shark and not wanting his competitors to have a monopoly over LLMs in case they win at some other game. It has nothing to do with "commoditize your complement."