> After all, they can only get so many of those visas, and there is only a 30% chance that the application will actually be approved. Once an immigrant is gran

> After all, they can only get so many of those visas, and there is only a 30% chance that the application will actually be approved. Once an immigrant is granted an H-1B visa, they don't have to go through the lottery process again for the next 6 years. If within that 6 years they apply for a Green Card and reach a certain stage in the processing pipeline, they will get extensions any number of times past the 6 years too.