Websites hosting large emulation libraries use archive passwords for several specific operational reasons:

Searching for a "Romsfun password" generally refers to one of three things: the password for encrypted file downloads, passwords used within retro games (like Mega Man X ), or a specific game title available on the site. 1. File Archive Passwords

Simple. By using the site's URL as the password, users don't have to search through hidden text files or external links to find the key.