I have been a website reviewer for over 5 years for several sites and they are pretty much the same. My guess based on my experience is that they get a client who says (Made up Example) we need 1500 people in the midwest who like to eat fruit in the morning who own their own businesses in the hospitality field. So since we are ll people looking to help society we answer a series of multiple choice questions not knowing what the demographic is that they are looking for. Maybe they ask if we like fruit. If we say know it kicks us out and back to the list of available studies then we start over on another till we find a study and we continue. Remember they have studies in Firefox, Chrome, Safari and on Mobile. So you go to each one to take the studies. I am a middle age White woman. Usually, they are looking for a different demographic but yet I am able to earn well over $130 between 3-4 websites. Between finding a study and doing one it takes me about 30 minutes. Sometimes you hit the jackpot and you get to do 30 or 60 minute ones that pay much more than the $10 per study. Now my Hispanic niece in her 30's who works in Education is able to earn about $180-200 per week doing this. I do get paid weekly. If something happens during the study like a few weeks ago the page I was answering questions on just closed and I could not open it again, I was only on question 3 out of maybe 8, but I still got paid the $10.