That doesn't make sense to me. If I can get 10 add on domains and ten times the resources with a basic plan, why would I buy a reseller plan for every site I wanted to host? I could just buy a new basic plan and get 10 sites hosted!
Am I missing something here?
Don't forget that under the non-Reseller plans (Basic, Business, Windows) you are
not permitted to resell or subhost to others for their sites' use. All the sites you put up have to be "yours" (admittedly not a well-defined term). You can't buy a Basic plan and use the 10 add-on domains for 10 customers' sites. And yes, the resources available with different LP plans are seriously out of balance.