Reuters: Red-hot oil prices are a blessing for big energy companies but often prove a curse for poor oil-producing countries. Exxon Mobil Corp and other energy giants traditionally use good times as an occasion to make prudent investments with their cash. But oil-rich countries that are poor — and often poorly run — tend to squander their windfall profits on dubious projects or have them stolen by corrupt officials. So when the inevitable price bust occurs, developing countries are …