I think they are easy to do. They send emails that you open and click the link. I was getting two a day for a total of 8 points, but they have slowed down a bit lately. They also have sites you can visit on their website, usually one 5 pt and a few 1 pts per day. And a trivia question worth 5 points and sometimes a survey for 5-10 pts. All in all maybe 10 minutes a day.
I have only cashed out once and have not received my GC yet, but its only been a few weeks. I have read however, over and over that many people wait for months to get their GC and some seem to wait longer than that.
I figured I would give it a try and see what happened since it is so easy to do. Nothing ventured, nothing gained philosophy, but others might have a different opinion.
Jennifer