We occasionally put messages from Zygo at the end of your group messages to let you and the rest of your group know about new features we’ve introduced, or just to remind your group that they can visit the Zygo web site to see all the messages the group has sent.
These messages from Zygo will never cut short any message sent by the group: Zygo messages only get appended to a group message if the group message is short enough for it to fit. Our messaging system inserts these Zygo messages automatically if a group message has enough space at the end.