I feel I have cheated a system

So, I have this amazon card and I get points back. Every 100 points is a dollar and I had like 50 bucks, I wanted to get a PSN Card

Amazon does digital, but you can't use points on digital

but since it's chase you can cash back at the same rate of 100 being a dollar

so I just dumped the money into the card so I could get the psn credit