As the article explains - this was not an option.

>SB 73 burdens the rights of all internet users outside of Utah because it requires adult websites to either know every visiting user’s physical location, and then block those in Utah, or to verify every visitor’s age just in case they might be in Utah. The law’s “actual-location provision in practice requires an entity to perform age verification services for every user visiting its site from any location because the entity would violate the law if even one of those users happened to be obfuscating,” the court wrote.

In order to withdraw from Utah, they would be forced to block traffic from everywhere since it's possible that some kid in Utah used a VPN to make it look like they lived in Singapore.

It’s really simple, require Utah to remove all their land lines satellite dishes and towers. Anyone found connecting to the internet from Utah and you fine the state of Utah