Original sentence: Invitations for Pownce were in high demand and were being sold on sites such as eBay.Pownce is centered around sharing messages, files, events, and links with already-established friends.Pownce was opened to the public on January 22, 2008
Edited sentence: Invitations for Pownce were in high demand and were sold on sites such as eBay.Pownce launched publicly on January 22, 2008.Pownce was centered around sharing messages, files, events, and links with already-established friends