2. ??
3. Profit
What is step 2? Normally, I would assume you try to minimize the incentives in buying stolen goods. In this market, nobody is above buying dubiously sourced oil, but what is the likely destination? Do the pirates patiently sit at the oil depot while the ship gets pumped dry, hoping the check clears and nobody shoots them on sight? Once you have an empty $100MM tanker, how do you unload that vessel?
Is it possible the Indian/Japanese/other-petroleum desperate government strike a deal with the pirates?