Actually I've been able to use Best Price Guarantees many times. But it's not as easy to use as you say it is: each program has it's own set of complicated terms and conditions and often reject seemingly reasonable requests. Also, usually the chain needs to independently verify the rate, which can take up to 1-2 days, and by that time, the rate may have changed. Also, often you need to book the lowest rate for the guarantee, which could be a nonrefundable rate.
Electroswing? Seems like whoever is running the survey only knows electronic music through the recent dubstep craze. I put electrohouse under Other as well...
Easy/Lenient/Refundable: Starwood (20% off) Marriott (25% off)
Easy/Lenient/Nonrefundable: Hilton ($100 certificate)
Medium/Nonrefundable: Hyatt ($50 certificate)
Hard/Nonrefundable: IHG (1st night free)