My suggestion is a multiplayer job board where you can post your own challenge. If the challenger fails at it, he pays you. If he wins the challenge, you pay him.

It would work this way:

– You make a job by selecting the forum to be pwned, the time limit they have to pwn it (if you want), and the money reward.

– If you want, you select the maximum level of players that are allowed to take the jobs (to prevent lv30s from taking your lv10 challenge, for example).

– You pay the money reward. The challenger also has to pay the same ammount to take the job.

– The challenger has only one chance to pwn the board. If he/she gets pwned, fails to beat the time or the 1 hour time limit runs out, you win. If he/she pwns it within the time limit, he/she wins.

– The winner gets double the ammount he paid. For example, if the reward is 1000, you have to pay 1000 to take the job, but if you win it you get 2000. On the other side, to post a job with a 1000 reward, you have to pay it, but if the challenger loses it, you win 2000.

I hope you guys like it.