Look at the article you linked to again. It says clearly Israel put a blockade because Hamas had taken over on the territories until Hamas was taken out. In West Bank, Israel lifted the blockade after Hamas was removed.

There is a Wikipedia article on the gate. How it was under Israel control until 2005 and after it was given to Egypt with Israel cameras watching what was going in and out. And canceling any imports they deemed so. Exports were permitted by Israel but not by Egypt. So nothing was exported.