I read earlier that you said we have a lot of features that free folks can't see, therefore can't want, or others don't know they exist.
I don't know what the stats are on people trying to access a premium feature, but get redirected to the 'give us your moola page'...So an idea.
I've always wanted to make a 'tour de ihub' but never got around to it.
Maybe for whatever feature it is that they tried to access, and get the upgrade page, we give them a little ditty, maybe an image too, detailing all about that feature they just tried to use. For example, some people might not know what in the world a private message is. Or Next 10 (I see this often). Those are seriously cool features that need to be explained.
And maybe even make a little "slideshow" of all features for people to see.
Grease up our marketing wheels. That actually sounds like a good project for me to play with. Whatcha think?