In this section, you can actually design and create your own card and print it out in your home to send to family and friends. There is a template to which you can upload a personal or family photo from your computer or choose one of the many images available on the site. You can also choose from among the many message options and also add your own personal note. Print it out and voila! You have your own custom paper greeting card that you can sign, seal with love and send just in time for the special occasion!
I sell physical prints mostly out of the fear of someone reselling. Like you said, they could still do that with a physical copy by scanning but at least that’s a little more of a hassle. I’d also hate to see my art printed on shitty paper or the colors are completely off because the buyer (or print service they use) doesn’t put in the effort to get the colors just right.
Make sure you save your Word, jpg or Excel files as a pdf. Pdf’s are generally easier to print. They can also be secured so that no one can download and change your product. Most programs give you the ability to “save as” to a pdf. If you use an Adobe product like Illustrator, it’s part of the program. If you use other art/graphic sites like Canva, Picmonkey you can always convert or print the jpgs to a pdf.