We can compare hosting with what a general market would look like:
– There is the factory who produces the product, then the wholesaler who buys in great quantity and distributes this to small stores. This is kind of a stereotypization of the market but it works quite quell to understand it.
– In a general web hosting market we have the Data Center which “produces” the hosting service, then generally we have a large company who rent a chunk of the hosted servers of the data center and set them up with a system to sell smaller accounts to customers. It is really not always like this, a lot of data center themselves sell directly to small customers, and hosting companies usually have their own data centers, so that the data center and the hosting company can often be the same entity.
But there is a common bug in every hosting situation you would find on the web, it is the concept of re-sellers. What a re-seller does is basically this:
– A re-seller buys quantity of resources from a company large enough to divide the resources, to resell them to other customers with of course proper rights, so that at the end a customer get a raised price but with an higher quality of service and support.
This should be the principle, but in reality it is not always like this. In fact, just considering web hosting re-sellers, the level of customization of web hosting plans is basically zero, what does this mean is that the customer does not get anything more than what he would have get directly from a hosting company. The support also cannot be any better than what the upper seller already have, because any problem directly connected to the hosting service needs to be solved by the company itself, basically loosing the customer time because he has to wait that the re-seller gets the answer from the company so that it can report it back to the customer.
If we think about VPS, and dedicated servers instead, the idea starts to make more sense, because given the level of software, and hardware customization that can be obtained, a person or organization interested in re-selling can achieve a much higher level of quality and optimization offering maybe niche hosting, focused on particular software, such as wordpress/drupal/joomla hosting or any other script/cms/framework for example like django and pyramid and so on…
So my advice is that if you are looking for web hosting, try to avoid re-sellers, while if you are looking for particular software hosting, then go on and try it, because I can assure you that the list of optimization that can be achieved by focusing on particular software is really really long.