Remember while you are thinking about this, you want the submission to be -

Stylish - Accurses to everyone, Ages 13-28 are the people that will probably be doing this... with many 45+ people involved in earning Xmas gifts... And probably 29-44 year old trying to make an extra buck in their pocket.

You don't want to be too plain usually... Any slang for money/giftcard/chips/poker/ combined with some other word that makes the website catchy and stylish like SWAGbucks can result in a successful website name.

Do not make the word too hard to spell... understand you have elders and children out there!

Make sure .com and .net is available so users do NOT get confused!