question

[mr.chya]

Whether it is illegal or not is up to the country you live in. I believe that in the USA it is illegal to download any copyrighted materials from any source not officially licensed and allowed to provide it by the copyright holders regardless of whether or not you pay for it. As to why so many sites provide such things anyway it is because the servers hosting them and the downloads are located in countries that do little to nothing to actually enforce copyright laws. Now with all that said I think it would be a good Idea for you to take a look at the forum rules as they specifically have rules against piracy and post's asking about/containing links to such things.

Here is a link to the rules: http://forums.ppsspp.org/announcements.php?aid=5