Ben Thompson says Meta and Google are making more money using AI to improve their ads than the labs are from selling it: "The biggest monetization right now is probably not in Anthropic or OpenAI. It's the incremental gain that is happening for Google and Meta." "They can actually validate their image creation and their text creation in a way no one else can. Their validation is the ad marketplace, running a gazillion A/B tests to see what works. Most ads don't convert." "What do LLMs do?…