Your playing small simply withholds your gifts
from the people who are meant to receive them, including you.
Can you imagine if your favorite musicians never let themselves make enough money to buy guitars, or take lessons, or hire producers, or buy purple platform boots and sparkly pants, or pay thousands of dollars for studio time so they could record the song that saved your ass in high school?
The more you have the more you have to share. There is plenty of money to go around.
You not letting yourself make it doesn't allow more for other people. Just as you making it doesn't take it away from them.
THE ONLY REASON YOU SHOULD FEEL GROSS ABOUT ACCEPTING MONEY FOR A PRODUCT OR SERVICE IS IF YOU'RE SCAMMING SOMEONE, NOT DOING OR GIVING THEM WHAT YOU SAID YOU WOULD, OR IF YOU'RE CAUSING HARM IN SOME OTHER WAY.