How often do "Just For You" questions replenish?

I used to go on Fluther, years ago, and it seemed that back then… The Just For You section would fill back up rather quickly after I’d clear it out. Now… It has been a few days since I removed the questions that first appeared there. I have a ton of topics selected as interests, but I have no “Just For You” questions.

How often do they replenish?
Or…
Is this feature busted?
If so…
When can I expect it to function again?

Also…
I wanted you to know… Yes, you! That this question… It’s just for you.