This guy was selling stuff stolen from US companies, and he doesn't think he should have to answer charges in the US?
Was he selling stolen things? Or did he make illegal copies and sell those?
Did he actually copy and sell things? Or was it the users who sold the illegal copies?
Did the users actually sell stolen copies? Or did they just give them away to others?
Did he have a DMCA-style takedown process?
What did he do different from DropBox and other online storage sites?
Was he a US citizen, or ever been to the US? Did his company operate in the US?
Were his crimes violent and criminal in nature, which would warrant extradition, or is this essentially a civil case?