OpenAI does not offer its services in Saudi Arabia. Saudis are blocked from registering. It's not a government block which works entirely differently and shows you a page explaining that it is blocked.

If it's blocked for political reasons I'd like to understand why, so we can understand their values that allow all those countries on the list but not Saudi.

I was able to register with a US phone number and VPN, but I'm also blocked from actually paying to get an API key.

I find the worry about compliance a thin excuse since a larger company like Microsoft that does have presence in the country offers Bing without issue. Same with SnapChat which has signifianct Saudi investmnet.

I believe it's some kind of misguided political activism.