Loyalty card companies database

[TheLastProject]

Stocard offers a list of cards to easily add. We should probably support something like this too:

What we will need:

1. List of companies that offer loyalty cards per country and an icon
2. A way to integrate this list into the app
3. Icon support

Preferably, we have a list where every entry has an unique ID so we can just use something like a companyId field in the loyalty card to load the relevant icon and also update if the company ever changes. I can implement this all myself, doesn't seem that difficult, but it is very important that we don't start our own list if one already exists.

So... the important part is: does anyone already have a list of companies and logos preferably in JSON or XML format or so under an usable license, or is this something we'll need to start ourselves?