Definitely an idea but less time consuming to do just one or the other. Also I'm thinking of the confusion for the customer. From what I see some digital download shop owners will offer physical prints but they do it as a "blank" store item customers can buy and then reference the image they want printed so I might do that. Do you sell digital downloads or physical prints?
Sarah loves doing whatever she can to help busy moms by providing them with the organizational tools they need. Often customers’ needs are slightly different from her product so she offers customization. This is hard to balance with the overall business because custom work in any business can be very time consuming. Sarah counters this struggle with requiring a minimum amount for custom products so that each order is worth the time she puts in.
The American copyright status of "Happy Birthday to You" began to draw more attention with the passage of the Sonny Bono Copyright Term Extension Act in 1998. When the U.S. Supreme Court upheld the Act in Eldred v. Ashcroft in 2003, Associate Justice Stephen Breyer specifically mentioned "Happy Birthday to You" in his dissenting opinion. American law professor Robert Brauneis, who extensively researched the song, concluded in 2010 that "It is almost certainly no longer under copyright." In 2013, based in large part on Brauneis's research, Good Morning to You Productions, a company producing a documentary about "Good Morning to All", sued Warner/Chappell for falsely claiming copyright to the song. In September 2015, a federal judge declared that the Warner/Chappell copyright claim was invalid, ruling that the copyright registration applied only to a specific piano arrangement of the song, and not to its lyrics and melody. In 2016, Warner/Chappell settled for US $14 million, and the court declared that "Happy Birthday to You" was in the public domain.
The thing about selling downloads is as a customer you get the product with in seconds or minutes after making the purchase. But I get there are some extra steps involved when buying digital downloads. You can also upload to various websites as opposed to goto nearest print shop. I think what I plan to do is offer both but offer the physical print as a empty order and when you order it you tell me what image you want printed. That way there is less confusion on what you are ordering.