If you pay for the all products subscription, their AI features are now bundled in. I believe that may be a relatively recent change, and I would not have known about it if I hadn't been curious and checked.

I’ve just checked. I have the ‘dotUltimate’ bundle, which now appears to include ‘AI Pro’.

They didn’t cancel my existing ‘AI Pro’ subscription though, and have just let it keep running with no refunds.

Thanks, Jetbrains. You get worse every day.