Newsletter Subscriber Segmentation

## Workflow Setup Guide

1. **Webhook**: Configure your Email Service Provider (ESP) to send click events to this webhook.
2. **Airtable**: Connect your CRM base. Ensure you have fields for 'Interest' and 'Score'.
3. **Logic**: 
   - Clicks on 'product' links add +10 score.
   - Clicks on 'blog' links add +2 score.
4. **Notification**: If score >= 50, Slack notifies the sales team.
5. **Error Handling**: Any failures are caught and logged to a Google Sheet.