> It makes US service providers, like Google and Amazon, very unattractive for businesses that require worldwide coverage
You know what is much more unattractive to these businesses? Getting on the wrong side of the US government. And honestly, I don't see any business (except for ones in Russia, China and Iran) changing provider because they don't provide service to Iran.
> damaging to our businesses (no worldwide service)
I'm confused, are you arguing here for allowing free-tier services under the sanction regime, or for getting rid of sanctions against Iran altogether? If it's the latter, then the argument is self-consistent. But if it's the former, then you're effectively saying that an american business which currently doesn't provide any services to iranian customers would instead prefer to provide free-tier services for them without any way to get them to paid tier, and that doesn't make any sense. If you know that users from a certain region would always be at 0% conversion, you would get nothing by providing them with a free tier.