I once made a page for a client with which he was happy and he paid for my work. But then he, apparently, forgot about the page and never put any content on it.

I once made a page for a client with which he was happy and he paid for my work. But then he, apparently, forgot about the page and never put any content on it. About 5 years after that he apparently ordered a new page from somebody else and now they are using it. Weird :)