White-Lable for full-service and aliasing urls for both.
You should make the full-service option 'white-labled' and have aliased urls for both feedback and helpdesk. If that was possible I'd purchase, that's what is holding me back.
feedback.mysite.com for feedback (with no ZenRep branding anywhere)
help.mysite.com for helpdesk (with no ZenRep branding anywhere)
A fully customizable look, so it's fully integrated within my site.