Some big numbers for a big title
http://www.nintendoworldreport.com/news/42546/shovel-knight-reveals-sales-including-amiibo
Yacht Club Games has revealed updated sales figures for Shovel Knight, and the Nintendo numbers are quite strong.
The game has sold 1.2m copies since its June 2014 release, with the 3DS version selling 29% of that figure (approximately 348,000) and the Wii U version making up 17% of sales (approx. 204,000). At retail, the Wii U version is the biggest seller with 76,000 copies, but the 3DS isn't far behind with 74,000 copies (38%/37% of retail sales), and the Shovel Knight amiibo has sold through 180,000 figures.
Yacht Club still plans to finish two major campaigns and other Kickstarter rewards, but is celebrating the sales with new 3DS themes and a 33% off sale in the eShop this week.
On the other hand, they probably profit more off a Steam purchase (even with a discount) than a 3DS purchase. I don't have any data about that though...I believe it is a cut 30% for both Steam and the eshop. Meaning because of the lack of sales culture, 3DS was probably the most lucrative.
