I'm starting to get obsessed with combining the nostalgic and archival features of news organizations. Previously I commented on Time magazine making a cover archive available. Screw the cover archive, just do a weekly "This Week In...". Pick a year, post some content, and ask users to write up their memories. Select the best. Promote to the front page (website or Tempo section).
How to get rich? Free for users, charge exorbitantly for sponsorships. This also covers your prizes too.