In 47 minutes I completed survey I received 6 screen outs. I made £5.72 of points (207) from completed studies. I also did £7 on PopulusLive, £1.50 on YouGov, got a few DQs on MintVine, searched on Swagbucks and did a few other small bits...
Everyone gets different surveys, and each survey wants different criteria. You're never going to get rich quick with surveys, but if you can get into a good routine there is some money to make.
I save my surveys up for a few days, delete the lowest paying ones, open several at a time and I use keyboard shortcuts to help me. I open X amount of studies (one from each of my different sites) then i just work through doing a few questions on each tab, then using my keyboard shortcuts to move to the next one. If I have to wait for a video to load etc then I move on to the next tab.
It has taken me some time to get into this routine where I can complete quite so many so fast. Also, I have a feeling about some that ALWAYS disqualify after asking questions and if I see those ones I just close them and take the risk that I might miss out on those points/that money.
I think the best thing you can do is just stick to the highest paying surveys if you don't like the rate of pay
I used to earn really low money but I've just got faster, more in tune with where the test questions are and can zip through most surveys. I'm sure there are other people here too who are doing the same