I'll give a clue - it's something that has required significant monetary investment on my part (I'm talking 5 figures US$) before I can offer it to users. I'll reset the 24 hr limit for the users who posted before. You guys can guess again.
How about integrating a spinning wheel where we can wager a fix amount of btc or the current BTC faucet reward? Chances of winnings like double, additional reward points, or additional lotto tickets, banner impressions, something like these. Well of course a better luck next time or zero reward is there!