The problem then becomes a fiat paid out amount dramatically inflated as the formula is simply btc paid out * current conversion rate if it is applied as omahapoker has currently done so...you likely meant something different however.
Even if you sort by amount paid out I still don't think SatoshiDICE would be "The World's Most Popular Bitcoin Game".
The only metric I can think of by which SatoshiDICE is the most popular is in terms of blockchain space used.
That record is almost impossible to beat lol, as SD is taking almost every spots in the "most popular bitcoin addresses" (FYR: https://blockchain.info/popular-addresses).
Yes. This is also the only metric that can't be manipulated without paying miner's fees (or mining your own transactions with substancial hashing power). Popularity could also be measured in how much mining fees people are prepared to pay for playing, and Satoshi Dice paid 5578.39727500 BTC on payouts, plus almost as much has been paid by placing bets. So with a strict definition it is still the most popular Bitcoin game