Good Idea!
Why not connect it to perk planes?
You can set any amount of peries on your "successful landing". But when using a perk plane you have to at least set the amount the perk plane costs.
If setting more than needed maybe add something to the icon so everyone can hunt you down

If you shoot someone down it is that you and the opposing pilot must have set a higher bet than needed to gain perks. The minimum of both bets goes from the loser to the winner.
Or there about.