Engagement. Ads in short videos are more likely to be skipped or navigated away from compared to an ad in a longer video when the user is engaged and more likely to stay engaged with that content through the ad.
Yes. If ChatGPT-like products will be widely and commonly used in the future, it's much more valuable right now to try to acquire users and make their usage sticky (through habituation, memory, context/data, integrations, etc) than it is to monetize them fully right now.
I've also found GPT-4o to be subjectively less intelligent than GPT-4. The gap especially shows up when more complex reasoning is required, eg, on macroeconomic questions or other domains in the world where the interactions are important or where subtle aspects of the question or domain are important.
I thought "slide to type" was default off--and at least I was sure it was off at some point for me. But your message prompted me to check and it was on. Thanks!