I've been browsing the responses, and seen much mention of selling ads. While this may offend some, it's a business decision, plain and simple.
You might want to look into Google AdWords. All you have to do is sign up and add their code to your site. They sell the ads, you don't. What I like about it is that you don't get commissions on sales. You get paid for clicks. I have found that commissions from affiliate programs seem to be non-existent. With AdWords, SOG visitors don't have to spend a nickel for you to make a commission. They just have to click the ad.
I've read their terms of service, and I saw that you have to be very careful not to encourage people to click the ads. All clicks have to be completely unsolicited. But the ads are topic-specific, so they will appeal to artists.
Give them a look.
www.adwords.google.com/