the courier shows up with spam from the various factions asking you to join, stuff like:
Hurry your time to join the Mages college of WinterHold is running out... join now and enjoy casting magic, impress friends, save the world.
Join the Dark Brotherhood, see Skyrim, meet interesting people, and kill them.
Join the Storm Cloaks, defend your right to worship Talos, hate all other races besides the Nords then we are the ones to join.
Join the Imperial Legion, scared of the Aldemeri Dominion, like to support a repressive but progressive all inclusive Empire, then we are the team to join.
Feeling forlorn, lacking that much needed spouce? Then Help the Temple of Mara and she will help you find that love of your life.