Ah.. So it is a packet offered by the company that hosts your server.
I mean, that 100Mbps are too much, and probably not required.
About the capacity of upload that the server needs, I just mentioned that a peak would be 60-70 Mbps for 300 players online, and no 100 that you offer.
Just a note to save money. but you finaly said to me that its a packet offered. So, you cant change it..