How do survey sites make money?

Question

Monetization

Good afternoon. I wondered how the owners of survey sites earn money?

Answer 1

I'll add to Bavashi 's answer :
Draining the analytics of a certain target audience for "cold" sales and for designing an advertising strategy.

Answer 2

The data is now very actively sold.
Make a fingerprint of your device and then show more relevant ads.

Answer 3

At the subsequent display of contextual advertising to you personally. Having your psychological profile, it is easier to choose an offer that will shoot, which means it will bring profit.