Preventing abuse? It's much harder to create a throwaway phone number than a throwaway email address.
> OpenAI does the logical thing. Let's me enter my credit card and I'm good to go. I will stay with them.
You'd rather hand over your credit card than your phone number? I think most people would see it the other way around.
Your phone number isn't.
What is a company going to do with your phone number that you're worried about...?
You know, that was my first reaction, too. But really, my phone number is much more integral to my identity. I can cancel or change a credit card number pretty trivially and then it's useless to you.
When did you make your account? I could have sworn I had to verify with my phone number before payment.
I've always had better experience with Claude in day-to-day coding and text writing, and looking at public forums that largely seems to be the case.