I've had multiple requests to add merchant ID to the OrangeLinks files. This field will be added in a release currently scheduled for Feb 24. It will be added as a column at the end of the file and should have data in every row. If you have other questions, please let me know.
Please note that all files will be updated to include this column, so if you've automated the loading of the file into a database or other structured storage, you may need to make changes to accomodate this new format. The IDs will be a variable width alphanumeric ID beginning with K, followed by up to 15 digits (K1 through K999999999999999).
Let me know if you have any questions. I'll be posting more details about the release when it gets a little closer.
Affiliate Product Manager