I really like that they establish it as their niche, and given their corporate focus it's also easy for them to take that stance. They have less to lose from forgoing advertising than ChatGPT with its relatively larger consumer focus.

I don't think ad supported business models are as bad as everyone says, though. Ultimately they trade attention for access, and access to this new kind of intelligence is already very important and will become even more so in the future. Claude already has pretty low limits in the free tier, so that's the price - perhaps a good one - for being ad free I guess.