I decided to try it. Signing up seemed to go smoothly, and I listened to a cut by a featured group, Kiltartan.

I searched for the Boat Band and got a list of the following cuts:
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Traditional Folk The Boat Band    Air - A Trip to Galloway MP3
Traditional Folk The Boat Band    Cumberland Square Eight Tunes - My Love is but a Lassie Yet/Whitehaven Volunteers/Through the Wood Spinning MP3
Traditional Folk The Boat Band    Cumberland Waltz/Kendal Waltz MP3
Traditional Folk The Boat Band    Hornpipes - Keswick Bonny Lasses/Stables'Grand Hornpipe MP3
Traditional Folk The Boat Band    Hornpipes - Stybarrow Crag/Iron Legs/The Calgarth MP3
Traditional Folk The Boat Band    Jig - A Trip to the Lakes MP3
Traditional Folk The Boat Band    Jigs - Cumberland Reel/Carlisle Races MP3
Traditional Folk The Boat Band    Jigs - Kendal Ghyll/When I parted/Ulverston Volunteers MP3
Traditional Folk The Boat Band    Polkas - Carlisle Reel/Haul Away the Hawser/Trip to Cartmel MP3
Traditional Folk The Boat Band    Polkas - Dear Tobacco/Bonny Cumberland/King's Polka No. 1/King's Polka No. 2 MP3
Traditional Folk The Boat Band    Reels - Robinson's/The Honeymoon/A bonny Lass to Marry Me/The Cumberland MP3
Traditional Folk The Boat Band    Song - Corby Castle MP3
Traditional Folk The Boat Band    Song - The Birds Upon the Trees MP3
Traditional Folk The Boat Band   Trip to the Lakes CD
Traditional Folk The Boat Band    Westmorland Waltz MP3
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I saw that it is 98 cents to download a cut, but I didn't actually download anything.

I didn't find a way to listen to the Boat Band tunes. I found that disappointing. Maybe someone here knows a way around that.

Best of luck with your music.