Reseller business is when someone sell web hosting after buying it from a web hosting company. There are many individuals doing this business and earning good income from it.
Is reseller hosting profitable?
Yes, this business is profitable business and like I mentioned before, it is a good business and people are earning thousands of dollars every month from it.
You can read this article from a website www.webride.net for more information on it. Here is the direct link
How to start reseller business?
You can start by buying a server and then selling it out to other customers. In order to get clients, you can run ads on google, facebook etc. You need basic knowledge for this in order to run this business.