It is a web site, like this one, that rates HYIPs. Monitoring gives various technical information that helps investors to choose HYIP to invest. Besides, monitoring display the current payment status of the project and a regularity of payments. Having active deposit, monitoring receive payments too that is how status is established. Also monitoring react to complaints of investors concerning problems with HYIPs. There is voting function where each investor can rate the HYIP and leave a comment.