Yes, there are always limitations, but they are not always critical."Unlimited traffic" such a thing does not exists because of network's hardware limitations. That's this epuipment that will record server's traffic, generaly it is centralised under one interface. If the information is relevant and available, customers can find it on their customer portal. For individual websites or individual application measures; it is up to customer to setup tools that will give them infomations about visitors and users.