Can you have attendees in GoToWebinar talk or text "chat" to each other during a live 500 attendee event?? If you can't - PLEASE - change it so they can. It is terrible that there is no way to ha...
I often reply to all with "great comment" or something similar to share ideas from an attendee worthy of a broader hearing. Since they feel included you will see even more great comments appear, but you maintain control of the conversation, so trolls or the perpetually clueless cannot hijack.