Not only do I use Amazon's Merch program to print my shirts on demand, I use the Affiliate program to make a bit of extra money!
I, Sable Sylvan, am a member of the Amazon Affiliate Program. This means that if you click links to Amazon on my store pages (shopsablesylvan.com), I might get credit for sending you to Amazon, so I might get some money if you make a purchase after clicking one of my links.
Sable Sylvan is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.
Disclaimer source: affiliate-program.amazon.com/help/operating/agreement