Posted again on the same DIS thread (does that count?):

Qualifying for surveys depends on demographics and persistence. I know some members get 8-9 surveys every day, which adds about $5 per day to their account. I strive for three per day, which earns me about $2. It usually takes multiple tries for me, but I can almost always get the Greenfield, Surveyhead and SSI survey each day, and if I have time, I try the others. Weekends and Monday mornings are more challenging since the survey companies don't usually add any new surveys during that time.

Some of the survey companies occasionally route to an Opinion Outpost survey, so you might need to click out of those since you are a member there. If that happens, you can go right back in to see if they have another survey. You can keep trying until you get one.

If you are not a member of the Sunshine Rewards forum, you should check it out. There are a lot of tips there to maximize earnings. I didn't earn very much my first few months - it takes a little while to figure it all out, but the forum is very helpful.