We were helping these people out. Our oil companies were helping develop the largest single oil reserves on the planet. American tools, technology, and expertise were at the forefront of those efforts, and yes, those companies were making a profit. Before Socialism, the arrangement was mutually beneficial, for the oil companies, to be sure, but also for Venezuelans.
When a Socialist Venezuela nationalized its oil, declared previous deals were no longer in effect, and took a much larger cut, the oil companies left. Americans stopped going there, stopped working there, and the oil production dropped significantly--and with it, oil revenue.
Like Maggie Thatcher said, "...sooner or later you run out of other people's money.", but in this case Socialist mismanagement of the resources and government policy killed the Golden Goose.
Even now, that resource remains. Perhaps when Venezuela gets its government on a rational keel and fosters a business environment which encourages investment the nation will not be so poor. Until then, Venezuelans need to work to bring that better government about. It seems even their neighbors are willing to help, but at what price?