If you maintain a genealogy, family or local history blog or site, you may be interested in soliciting viewers to contribute to your Ponga pictures. For example, if you've used your family history website to find cousins using SEO, you can selectively invite them to contribute to your pictures after you've connected.
This helps protect the Personally Identifiable Information (PII) you might choose to include in pictures from bad actors who might use it to perpetrate identity theft.
Feel free to reach out if you have questions. Just ask in the Ponga chat box!