It's all calculated. Who's buying the oil? They sell millions of dollars worth every day. It will be the wealthiest Europeans, Turks, Kurds, Israelis profiting from it. Western media were acting like taking out IS would have been difficult for them, look at that video of Russia bombing the refinery Elementalism posted, there's no way you can convince me NATO were unaware.
This isn't about some small group on the Syrian border, it's about provoking Russia and dominating Putin publicly. Best believe that Turkey didn't down that plane without the green light from NATO.
After Iraq Western Govts could never convince the public to back another war in the Middle East, so IS makes a convenient enemy. It's no coincidence we're bombing these countries and forcing refugees out at the same time as our Gulf State allies finance more Wahhabi mosques in Europe and the media is full of barely concealed attacks on Islam.