Re: Non-product
http://www.netmarketshare.com/report.aspx?qprid=11&qpaf=&qpcustom=Linux&qpcustomb=0
Based on usage (not sales) it's about 1.5%.
The fact you recommend a variant, and someone else would probably recommend a different variant, plus the fact your recommendation is "for a first time user" suggesting you'll soon grow out of Mint and look at installing something else, is potentially some reasons why the figure is that low despite being free.