No.
You can use both Royalty-Free and Royalty samples in your beats without sharing your beat-licensing income with the sample creator. The only time additional requirements apply is if a beat containing a Royalty sample is used in a major-label release or the resulting song passes 1,000,000 streams. At that point, you must register the track with us. Registration includes confirming songwriting splits, producer/writer credits, and—if applicable—allocating a share of any record royalties generated by the final song.
This also applies if you sell exclusive rights to a beat containing a Royalty sample, so make sure your buyers are aware that credits and splits may be required.
If you have questions, email support@wavs.com.