Alright, I've seen this happening way too many times and I want to say something about it.
100 DA points is not worth much.
You can buy 800 DA points for $10 USD.
800 divided by 10 is 80.
80 DA points = $1
100 DA points = $1.25
If you're offering commissions for 100 points, you're being paid $1.25. If you're offering 100 points for a prize on a contest, you're offering $1.25. I've even seen 50 points ($0.63) or 20 points ($0.25). I don't know how much it is in other currencies, but I can't imagine it's much.
I spend at least 3-5 hours on a painting. Minimum wage is $7.50 USD where I live. That is not even enough to live on if you're working full time, so I expect to make at least that much for every hour I spend on doing art for someone else. If 80 points is $1, and minimum wage is $7.50, then the minimum cost for a commission that only takes an hour is 600 points. When I open up my own commissions, I take sketches for $10 and paintings for $20+ Depending on how much time it takes, whi