I check this site, and have one of the worst download speed in the file hosting industry, 50 kb/s should be the minimum.

If you do not want free downloads, just make it premium only, but giving such speeds will make uploaders stay away.
KAINSMONEY Reviewed by KAINSMONEY on . MountFile - Pay for all files and Up to $25 per 1000 downloads and 30% of refs' earns MountFile.com is a high revenue premium filehosting that pays for ALL FILES and ALL COUNTRIES. All traffic is accepted. # Up to $25 for 1000 downloads # Up to 15% revenue reward # Pay for ALL FILES and ALL COUNTRY # No file size limit to get revenue. # 30% of ref. earns # Minimum Payment: $20 every Monday by PayPal # Unlimited speed and bandwidth # Free 500GB and no deletion Rating: 5