Please always use the full affiliate URL you find in your affiliate panel for all you campaigns. This is important in order to earn a revenue share for referring customers to Bitpanda.
You can however add custom tracking tag to your base affiliate URL. This way you can conveniently create sub-campaigns and track your earnings from different sites, channels and so on.
Please note that you can use alphanumeric signs [^A-Za-z0-9\-] for the tracking tags and that they can be up to 12 characters long. A full tracking link including a tracking tag can look like this https://www.bitpanda.com/?ref=123456789012345678&tag=abcd2018