The use of traffic cannot be physically restricted. This means nothing happens if you exceed your traffic limit that initially equals Free gigabytes allowed with your account: your web-sites, mailboxes and virtual ftp accounts will continue to work. Each GB beyond the limit, however, will be charged at the overlimit rate. To prevent overlimit charges, you can reserve more traffic by changing your traffic limit to the bandwidth level you are expecting to have. With traffic limit increased, each traffic month you’ll be accrued recurrent fee for the whole booked amount, which is usually lower than the usage(overlimit) charges.