LimeSurvey Gift Link Integration

I have a fully anonymous LimeSurvey questionnaire that should end with a “thank-you” screen showing each participant a unique Amazon gift-card link pulled from a text file I will supply. No e-mail or other personal data may be collected at any stage... (Budget: $10 - $30 USD, Jobs: API Integration, Data Management, Data Processing, HTML, MySQL, PHP, Software Architecture, Web Development)