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What about community-updated factoid? I think that they were nice. It might surprise you but I love the idea of ads on this forum, it gives you a little break between original post and replies and also it's nice when you see something new displayed.

Added, thanks! What looked best IMO was to do the arrow and black color, but without the text-decoration:none or cursor: default.

~while maybe the factoids were providing some value, many of them were outdated.