Positive: More people that commission you means more gain in a faster period of time. Negative: Will receive more commissions leaving you to work harder, and not receive as much of a satisfying point reward.
--Keeping the current prices--
Positive: Same amount of commissions, and no loss to it. Negative: People who can't afford that many points are left to find some other artist that has cheaper prices.
It all comes down to weather you have the time to do a lot of them, and if you can keep up with the amount of commissions received.