anyone can me easy how to earn on this host
I'm not sure I understand what you mean. What do you mean by 'anyone can me easy'?

I assume 'how to earn on this host' is a seperate question?

If so, it is simple. If you make a premium sale (download on premium), you will recieve at least 20% on the sale, and up to 99%.

How?

If you price a file at $0, the file will be freely available with premium downloads available also. The premium downloads are charged per GB so 1GB would cost the downloader $0.10 and the uploader would recieve $0.02.

If you price a file at $1.00 for example, then you would recieve $0.90.