What is the best definition of Crowdsourced data collection?

Crowdsourcing should not be used to gather data because there will be too many opinions and not enough facts

Crowdsourcing is the process of obtaining needed data by soliciting contributions from a large group of people, and especially from an online community, rather than from traditional employees or suppliers  

Crowdsourced data is the best way of finding data because so many people are contributing their definitions

Crowdsourced data is the data that comes from using a company wiki to gather data because anyone in the crowd can contribute

Crowdsourced data collection is only used by researchers to answer research, survey or feedback questions