Suppose you need to run a group of HITs open only to participants who are women under 50. You previously ran a HIT and know the Worker IDs that you want to reach, but have no way to email them and limit your survey to only them. How can you proceed?
CloudResearch.com Worker Groups and Worker Emails
When you create a Worker Group, CloudResearch creates a Worker Qualification and grants that Qualification to the users you specified. The HIT you create with that Worker Group Requirement, is limited by Amazon to the workers you specified.
Amazon requires that the Workers you specify have worked for you in the past.
If you need a larger pool of workers, or need a custom demographic panel you may wish to consider using CloudResearch Managed Research which, for a small fee when compared to Panel Providers, will obtain your panel for you.