Multiple add-on domain names are too good to be true
Many web hosting packages come with free and unlimited add-on domain names. In short, they allow you to subscribe to just one web hosting account, but you can host more than one website on it.
Web hosting resellers and businesses with more than one website may find this an attractive option, since this can help them reduce their hosting costs. But, what they don’t realise is that add-on domain names are too good to be true. Want to know why? The answer is quite simple. The servers will be overloaded. It’s just like web hosts offering free and unlimited mailboxes, you don’t have control, so how can you manage the servers’ resources?
Add-on domain names are even more confusing because they mess up the structure of your file systems, as well as complicate user control and shared resource management systems. Despite its drawbacks, many web hosting companies use it as bait. In my opinion, each web hosting package should support just one website, or to be more technically precise, one domain name only.