People always have the wrong mindset where they thought if they want to earn more, they have to spend more.
This kind of mindset will actually lead to fatal results.
Example, some people thinks that using the unbranded version of WHMCS will bring them better reputation, and people will not know that they are not using their own inhouse billing system.
But then again, think twice. Even if the branding was removed, people will still know that it is WHMCS. Even if people who know nothing about WHMCS, but as long as they search for a hosting billing system in Google, WHMCS is the 1st that come out. You will not be able to hide it.
Furthermore, who give a damn about you paid more expensive for your WHMCS or not? All they care is just are you using a legit copy of WHMCS or not, not how much extra you pay to remove to branding.
As long as it works for them when they make payment, it is good enough for them.