I just checked my eBay feedback for the first time in a week or so, and discovered that my rating has passed 100, turning my Feedback Star from yellow to turquoise. I always wondered what it feels like when a D&D character gains a level — now I know!
Historical note: eBay later modified its hierarchy of Feedback Stars, adding a blue star (50-99 points) that comes between yellow and turquoise. So it’s no longer possible for a user’s star to turn from yellow to turquoise.