Send an E-Card Send an E-card to a friend you want to invite! E-cards include a picture and info on the crusade, along with your own custom message. Send an MP3 E-Card Send an MP3 E-card that is a 15 second MP3 sound-file, inviting your friend to the crusade Join the E-Force Join the cyber-team, which will surf the Web and invite people to watch the webcast, come to the crusade, and even share their faith when they get the opportunity!