it should be easy. people who have the willpower to do this on 15 chars daily (i know only 3 people who do that out of all players) will do it anyway and are not affected by this.
so yeah keeping the reward as it is and adding one more attempt will only change that more people might do it which is a good thing imho, there are more way more free to play players than payers and giving these people less headaches getting their premium currency is a positiv thing.
and I also know there are people who are not really skilled at this and give up and dont bother with this anymore