If you have had a hosting account in the past, you may have come across a situation where you pay money for some unlimited feature only to find out later that it happens to be limited and you've got a fixed quota. This may happen with the hdd space, the monthly bandwidth, the database storage and other features which many hosting providers present in a way that's different from what you'll really receive. This is the so-called overselling, which companies use so that they can attract customers even though they are aware that they are unable to provide their customers with the features they promote usually due to the type of their hosting platform or in the case of the resellers - because they have some limits from the actual web hosting provider.
