Purple, which installs WiFi points in public places, conducted an experiment. Within 2 weeks, 1000 hours of public works were registered in the user agreement for Internet use, including cleaning of sewers, cleaning of portable toilets, cleaning of parks from faeces of animals. Also in the text was information that instead of public works you can get a prize. And only one of the 22,000 people responded.

The reason for this experiment was the concept of the Terms of Agreement, the reading of which takes people too much time.

Recall, as reported URA-Inform, NASA is looking for volunteers for a paid experiment with drugs.