Why do people do this

[countrygirl12]

I don't have referrals so i am not sure how many times people go online or not.

I don't know how many times they go online.  The only way I know they never done anything...

You get $1 when they sign up using your link (not from their money)
You get $2 when they complete their first offer (which could be a survey)
You get $5 each time they cash out (again not from their earnings)

SO if you never get anything past that $1 then you know they never done anything other than signing up. 

[makeblessed]

I guess they just lose interest or perhaps just don't want to put the time in to do anything; It does require commitment; sometimes people may sign up for something and not really understand what is required.

[mrisha]

I don't think that they really hear how they can make money.  When they find that sometimes when they attempt to make money completing surveys they are told it's "unfortunate that the survey you completed is no longer needed  or available" and they have spent 30 minutes on the survey.  That happened to me a couple of days ago.  I spent 40 minutes answering the questions and I get the nasty message.