How in the heck can you complain?
I think the main complaint about Tribunal is that it's actually "work" to go through 10 cases a day [thoroughly] for peanut pay-wages. Should it be our responsibility to clean up the streets? Frankly I just want to play the game without people clowning around and ruining my personal time. Now I have to deal with these people both in-and-out of game.
10 ip per case correctly assessed should be the compensation. That's 100 ip per day, which seems reasonable.
Also, the more cases Riot allows to be evaluated per day, the more likely you get people shaving corners and simply waiting for the minute timer to click Punish. If people are taking cases seriously and spend a few minutes evaluating most of the games, there could be a serious amount of time invested in this system. Eventually people will be OK rushing through cases because no one wants to sit here for an hour+ reviewing the same types of cases over and over.