You can offer things as long as they follow these rules at a minimum:
You own the rights to the files, ie you produced them, or the items ha a license which allows it to be shared
The files are not from an illegal source, example a warez site
The files are hosted on a website not via a service such as mega, uploaded, rapidshare etc
The files are not offered in return for doing a 'survey' or 'liking' a social media platform
We do reserve the right to remove any links that looks suspect though
As a side note we may need to update them rules up top, we do follow slightly different rules now....