Well, it shouldn’t be too complex. But I’ve never seen existing codes accomplishing this either.
Can I code this for you?
Since I’m not a native speaker i’ll try my best to describe what I’m looking for.
We want to release a new album and there will also be a limited vinyl edition (max. 500 pieces) and every item contains an unique code. This code will allow one download of a mp3-version of the album. I thougt about something like http://themeforest.net/item/php-login-user-management/49008 but with a 1-login restriction or something similar.
Actually it could be much simpler. A database where i can add the coupon codes, simple login/code request page, error page, page with download link of the file and the deletion of the code from the database.
Any ideas are appreciated. I’ve searched the web for some days now, but didn’t find something..maybe i have the wrong keywords or something like this doesn’t exists, yet..