Well it is also cost effective. A lot less expensive to purchase a download and then print it yourself on your home printer, at your local printshop, or online through a website. I don't know if it's more of an impulse purchase. I think it is attractive to people that like DIY projects. By using a downloadable file you have a lot of options for printing as opposed to only have it printed in one way.
About TheSwagElephant: I started The Swag Elephant as I was planning my best friend’s bachelorette party. We were going to Las Vegas and I was super inspired by “the Hangover” and wanted to create some sort of fun accessory for the bachelorette party attendees. I decided to create gold foil temporary tattoos that say “bride tribe” and “wolf pack” and they came out great! They stayed on in the pool and the ladies loved them, especially the bride.
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.