I enjoy this trivia site. The daily quiz is good, wish it was on the weekends as well. And the Trivia Dual is fun. I don't use all the different quizzes and tabs yet since I'm new to it, but I hate to miss a daily quiz. And it's free - can't beat that! No annoying pop up ads or ads you have to sit through before you play.
Tip for consumers: Enjoy yourself, poke around to the other quizzes, get on the list for the daily quiz reminder.
Products used: It's a quiz site, so most of the questions here aren't germane.