I'm not sure if this is an underlying problem with NopCommerce or not but I believe it can be easily solved with Meta tags disclosing which image(s) can be shared. As it stands, Facebook insists on using my site logo which should not be an option and never happened before you introduced the ability to change logos from the admin panel. Pinterest doesn't even grab an image from mobile & tablet browsers, which makes up nearly 75% of my customers. I fear that I'm losing a lot of word of mouth business because people cannot properly share my product images.
Is this something I am doing wrong, that NopCommerce needs to address or that you can resolve with meta tags in your themes? Any assistance is much appreciated! :-)
To be specific, I used the addthis sharing service on my NC3.1 site www.iowish.com from a Samsung Galaxy 3 and a Nexus 10 tablet, both using chrome and Firefox browsers.