Yeah, since that already passed, that's a potential issue here. It seems like that was passed as an alternative to SPS staking requirements. If they have to implement SPS staking and burn half of the DEC they get in sales, that might be too crippling. It's worth a conversation, though. It's a little broken the way it is now.
The DEC burn helps DEC, but it doesn't do much to deter people from exploiting the game by running multiple accounts in the same league that can get more leaderboard spots with fewer attempts. In some cases, the alts don't need to use any tickets, so they're getting that SPS without spending any DEC.