iDine/Rewards Network - 3Secret Question*

I tried a search but found nothing, so sorry if this is a stupid question:

I see "3Secret Question*" under the Rewards Calendar for a bunch of restaurants I'm looking at on the AAdvantage Dining site. I am logged in. I cannot figure out what this means...can anyone help? Thanks!

Can you give an example?

I tried again to give an exact example, and now it says "3 miles per dollar", as I would expect. I don't know what was going on before...oh well.