I don't think JPA is a thing atm, since many players can just do 1vs1 whenever they want in multiple private servers or even in the maps, we are way more organized than years ago and putting money from your own pocket as a trophy for the winners is never good for health.
Here goes an suggestion.
I think the most viable solution is JPB, where the prize is the money from the own participants. For example, a entry fee + initial prize (Uridium/Ammo): Cost to participate 1€, minimum registered participants (with paid fee): 66 (22 per company). So minimum prize 66€ + initial prize.
To difficult and even to avoid groupping at JPB, the map could be separated in 6 blocks with 11 participants in each block, once each block has it's survivor, the map could be splited into 2 blocks, left and right side of the maps (can you even imagine what i am talking about ? lol) with 3 participants in each (6 survivors total), and then, the final with 1 survivor in each side.
I hope that may awake someone's interest, specially yours @
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