If your product does not comply with the laws of a particular jurisdiction, you simply do not ship your product there.

It does not really matter if Somalia makes selling online porn difficult; you simply block that country and forget about it. Even if Somalia issues a warrant for you it doesn't really matter because you will probably never ever go there. If the US makes selling porn difficult, you pull up your sleeves and figure out how to comply because the US market is more important. The US market is so important to adult webmasters because of the sheer population size, disposable income, and comfort level of making online purchases. You don't want to give up on the US market but you definitely do not want a red flag attached to your name when you decide to visit Las Vegas or your plane happens to get diverted to Houston. I would forget all worries about extradition. Only actual CP, money laundering, fraud, and capital crimes are important enough to justify extradition. However, if you make money and work in the international world, you will travel to the US at some point, and you just do not want the US to be on your "I can't visit there because I don't know if the nice men with badges who greet me at the gate will let me leave" list. Business people that are involved in international trade will have a US destination on their travel itinerary at some point, and nobody wants a layover or business meeting to result in an interrogation or arrest.

Gaming sites are bigger, make significantly more money than the entire adult industry, and are probably "less evil" in the minds of the religious right that pressures legislators to make laws. Yet a law passed last July and a few arrests of non-US residents resulted in almost the entire online gaming industry pulling out of the US market. Gaming sites are bigger than adult, they are more legitimate than adult, and they make shitloads more money than the entire adult industry combined. Yet they still pulled up their tent stakes. Pornographers have only one advantage over casino operators--the 1st Amendment.

The 1st Amendment is what holds the US Congress back from banning the sale of porn. Unfortunately, it does not prevent Congress from fucking with the sale of porn, as they have done with 2257.