How do aggregators like zoon, yell and others rank sites?

Question

Search Engine Optimization

Greetings.
Share your experience, knowledge, assumptions about how, by what algorithms sites are ranked in aggregators like yell. I looked at the distribution of companies in several sections - neither the number of votes, nor the ratings, nor the dates, nor anything else that is visible, affects the place the companies occupy in the section. I thought so, what do you think?

Answer 1

Those who paid from above, the rest are randomly with us