Well maybe not every day, but having a short feedback loop and the ability to run your code multiple times with different variations is generally considered to be a prerequisite for software development. If you actually want to keep developing the model, you need the funding to be able to train it more than once.

Because things happen every day. If ChatGPT wants to compete with Google, staying up to date with recent events is the minimum bar.

Probably one where there isn't an intrinsic conflict of interest with AI risk. Or from a more traditional angle, one where the author's vanity isn't required to be appeased in order for users/customers to be happy. I'm of the opinion that you should do something with game-changing technology because the world needs it, not because you need an ego boost. All technology brings side effects, and there is no greater example of that than "democratized" AI...

Noble? You're anthropomorphising machine learning. On possible motiviation would be to train a model, instead of training a model in order to create publicity around a model being trained.