Drugwars is a bad idea imo because the economics of the game are a ponzi sheme. But it depends, it wouldn't be a bad idea if you just upgrade your buildings a little bit. Because it's a different kind of ponzi than normally, with this game people on the top get screwed the hardest. Because the more you upgrade buildings the less your upgrades will be cost/effective. It becomes more and more expensive compared to the resources you get to upgrade buildings the higher the level.
Magic dice is gambling and the odds are stacked against you. Over many games you will most certainly lose money because the casino has an edge over you. (That's how they make money) If you have a 49% chance to win 2 times your money. Let's say you put in 1 steem per bet. That means you will win 49% of the time 1 steem and 51% of the time you lose 1 steem. So you have a negative payout ratio.
It's smarter imo to be a casino. You can invest in the bankroll on Moonsteem that gives you dividends when players lose money. And they surely will over time.
Bidbots are profitable but most find them not ethical. If it's only about the money it's probably one of the smartest investments here on Steemit. You can sell your votes automatically with Smartsteem and earn a return.