To be legal, a payment must be for work actually performed and must bear a reasonable relationship to the market value of the services provided. (realtormag.realtor.org)
I understand that you want to keep the perceived value of the service high so you are vetting the books right now. (jakonrath.blogspot.ru)
This list is ranked by features and value of these services with checking and monitoring you credit scores & credit reports as the top priority. (gotcredit.com)