another plan for the future or more likely plans to remove another feature.
direct mediafire upload will be removed from dashboard submission in future. reasons:
only 4MB filesize.
has some security concerns as it uploads the file to musicbee server first.
also for the previous reason would create bandwidth issue
someone has to monitor mediafire account.
if not monitored anyone can upload illegal stuff and the account could be taken down. which creates the issue of losing all uploads.
due to these reasons it will be removed. IMGUR upload on the other hand will stay.