The user has very little limitations and can upload different sizes and types of documents such as photos, documents, files and information.
Most of these limitations are in place to keep those interested in posting at the sites to design posts that are concise and to the point. Using a limited amount of space will enable many others to have and enjoy the opportunities to use the same free web host too.
It also ensures that some control is in place to govern the users commitment to the postings as those who are not really committed may end up abusing the so called free facility given.
Some of these limitations include tinier bandwidth over a fixed period and it does not allow hot linking to files.
Also there may not be facilities to certain link files such as MP3, MPEG and ZIP files, and there is no real guarantee that there will be accessible adequate uptime.
For some these limitations may not eventually be feasible for them to consider posting at the free web host and may consider other options.