Why Unlimited or Unmetered hosting packages are not possible?

There are hosts that offer unlimited bandwidth. What they mean is that they may not expect you to use more than a certain amount, as there are practical limits on most everything, including bandwidth. To claim unlimited is typically a marketing 'hook' to get you sign up. In reality, once you reach a certain limit, you will no doubt hear from this host to do something about this bandwidth consumption.

For example, it is as if you were to try to transfer multiple large files ( * > 1 GB ) on your home connection 24/7 for a whole month. The fact is it runs out somewhere.

Another marketing scheme is that of offering unmetered which says you can use however much the server would allow in a possible months cycle. Without a doubt the host will contact you or suspend your account.

There are some legit hosts that offer unlimited packages either as a marketing method to get their business noticed or promote it over another business. It is highly recommended that you look into your host before you sign up with them, ask them questions. If the host is really interested in you they would reply to your questions without a problem within 24 hours.

Even if you do not plan on using much space, keep in mind you are not the only one on that server and you will get other people abusing such a policy rendering you pretty much useless in the sense that you have only used a few megabytes of storage and some other person on the server is using gigabyte upon gigabyte.

Many hosts that offer unlimited or unmetered packages have fine print or policies that clearly state that if you use more than a certain percentage of the servers resources, you can be charged extra, you can be shut down, or any other consequences in relationship to resource usage. Be alert because this goes to show that the service is not unlimited and not unmetered. This can also hurt your reputation...