If you only playing Evolution gaming most of the time to farm your wager. There’s a transaction history feature on there menu tab to track all the amount that you wager for that day and other dates that you play in the casino but if you are playing random games including slots then the tournament counter is the best way to track your wager because it records all the wager made in all of the games in the casino.Crypto Crunch tournament is the best active tournament so far in the casino because it has 300mbtc reward while only few players are competing on the top spot. Even a 30mbtc wager can give you a spot above top 30 with 0.5mbtc reward.
No you're wrong only eligible games count for each tournament. Usually you can find a list of those eligible games on the page dedicated to the tournament but sometimes it doesn't display properly (on my browser at least).
Crypto crunch tournament accepts all games in the casino. This tournament gives 1 point for every 1mbtc wager on live games and 2 points for 1mbtc wager in slot games which technically it covers most of the game in the casino. The tournament you are pertaining are those some special weekly tournament dedicated for live games but there's always a tournament dedicated to all games in the casino with just different point system as shown above.
No, even the crypto crunch tournament doesn't accept all games. As I said above you can check the list of eligible games at the bottom of the dedicated page, and you won't find One Touch Bombay Live or 7Mojos for example. You can test it yourself, play to a One Touch Bombay Live game and check your score in the leaderboard. Regarding the weekly tournaments, the current one (the Blackjack Race Tournament) seems to accept bets from those 2 providers currently.