watermark only on site not in feed to marketplaces

Hi,

I’m searching for a watermark plugin with helps me to add a watermark on my images on my site.

But, I also sell my products on marketplaces like Amazon, Ebay and Bol.
Offcourse they don’t want logo’s on the images.

So my question: how does your plugin work? Do you understand my problem? Can I use your (paid) plugin for my website and still send my product feed to marketplaces without the logo?

Regards,
Haico