Offers: Email Submit CPA
Traffic Source: Explained
This method has been used since like forever. People are paying $47 for this guide.
First you need to find some email submit CPA offers for specific region, say Germany.
Buy a domain, something like a company and create an email account with that domain.
Find job posting website for specific region.
Create your ad saying you have job opening for reviewers position. Ask them to email you if they are interested.
When interested people emailed you. Reply with something saying you need to test their skill. Go to this CPA offer link, signup there and write summary or what part of website can be improved in one sentence.
You can send them a portion of your CPA commission to their paypal.