Minor detail: The company that owns my company makes truck parts. They do business with Iran. My job is essentially government contracting, so I often have to sign forms that say we do business with Iran. It doesn't prevent us from doing business in the US. It's just a form you fill out and submit along with your bid. If anyone at the buyer has an issue with the Iran thing, they can throw our bid out because we do biz with Iran. But they don't. I honestly don't think anyone reads that form; in today's globalized economy it just isn't practical to think your little form can stop a $50 bn company from doing business wherever the fuck they want to.
I was looking for some good charts but this BBC piece does most the work for me. As a result of the sanctions, Iran's gross domestic product (GDP) contracted an estimated 4.8% in the 2018 and is forecast to shrink another 9.5% in 2019 , according to the International Monetary Fund. The unemployment rate meanwhile rose from 14.5% in 2018 to 16.8% in 2019. https://www.google.com/amp/s/www.bbc.com/news/amp/world-middle-east-48119109 There's lots more horrible reading to be done. If you're an American NGO that stands against the current government you've talked to your bank about why it should give you your money. If your an Iranian hospital trying to buy medicine you've had trouble finding a bank to deal with you. My wife had venmo stop payment for an $8 Cubano sandwich because her topic line was Cuba, the payment was to the guy who sits at the desk next to her. Good luck venmoing someone in Iran. Your company must have a waiver from the Treasury. I bet it was a lot of paper shuffling to get it done.