Humans respond to the human face better than they do feet
I want to see the faces of people who have received your postcards.
This joy would inspire me to get over the pain of finding the right photo and uploading it to your service.
The more effective you are at conveying the fact that you are building a joy machine that connects people, the faster you will get adoption.
At the moment, your site looks like a robot built it and there are no humans involved in the process.
See research on how humans respond to faces for more on this.
https://www.sciencedaily.com/releases/2019/01/190121161632.htm
