Song Rhythm Tracks uses high quality audio of great sessions drummers. They are a good fit for inclusion into mixes of studio releases. Alive Drumming grants license to remix its tracks. That is, you can take the Song Rhythm Tracks audio, mix with your own content, and sell that mix as your own work without paying a fee to Alive Drumming.
Alive Drumming prohibits resale or redistribution of its un-mixed, original Song Rhythm Tracks. You cannot sell or give away these tracks unless you mix them into a new creative work.