To what extent do customers use reseller hosting?

I am looking to open a reseller account in order to separate access to my different websites and to be able to delegate access without any contractor / VA being able to see and possibly modify all my activity.

(I also have a group of shared hosting sites infiltrated by malware and I wish they will be further apart in the future!)

Professional Web Hosts: How often do your customers tell you that they are interested in reseller hosting for a use case such as this one, ie that they have no intention of actually selling accommodation?

(I've always avoided even looking for a dealer for this reason and that's only when people here have informed me that this might be a good solution for my needs that I've checked).