Built for a surf equipment retailer's exclusive SMS deal club, this system runs on three connected Make.com scenarios. The signup handler turns a landing-page form into a fully onboarded customer: it checks phone and email for duplicates, creates or reuses a BigCommerce customer, and sends a welcome SMS plus the current deal as an MMS. The broadcast scenario polls a Google Sheet every 15 minutes; when the operator flips a deal to Active, it fans out an MMS with the product image to every active subscriber and marks the deal as broadcasted so it never sends twice. The reply handler routes every inbound text by keyword: BUY returns the purchase link (or a sold-out or no-deal reply), INVITE sends a shareable invitation, HELP lists commands, and STOP/START manage subscription status, turning a one-way broadcast tool into two-way conversational commerce.