try doing surveys that sound easy to you.

hmm? all of those were very easy to me.....

Actually, the easy ones will probably fail, since it basically needs no attention at all to do them.

You might get better luck with more complicated ones.

None can tell though.

You need to find a ratio between complication, time to complete and TC offered as a result. From this it's possible to have a pretty successful rate of payout from the surveys.