Not exactly right. Members submit frequencies (and forum comments, etc.) to Radio Reference (for free) and by submitting them "the submitting user grants RadioReference.com the royalty-free, perpetual, irrevocable, non-exclusive, transferable license to use, reproduce, modify, adapt, publish, translate, create derivative works from, distribute, perform, and display such Content" per the site's Terms and Conditons
Terms and Conditions).
The submitted data is available at no charge to users to be used for "private, personal, non-commercial viewing purposes". To help pay the cost of running this site, they provide additional services by subscription through their Premium Subscriptions
Premium Subscription Information Page (a better way to provide the data than make you pay for all access, you must agree.)
One of these premium services is one which allows the user an easier way to enter the information into their scanner. At no charge, they allow you to look the data up and manually enter it into your scanner, which for large trunked systems can be tedious and error prone. With the premium subscription, you can simply download this data through the premium web service that many scanner software programs can interface to help automate this process.
While it is your right to not submit frequencies, the logic you justified it by is somewhat like saying that you refuse to drive because somebody built a toll road so why should you pay for gas since that would force you to pay the tax for building and maintaining roadways.