what examples do we have of having nice liquidity/action on both sides of a sports bet on a public betting exchange? for the most popular sports, the liquidity problem is mitigated on the most popular bets like moneyline, but what of spread bets or sports-specific proposition bets? I worry that spread bets won't be liquid or have enough action and so will be very choice limited to the extent of peerplays market size on that particular sports game