List growth is the single biggest leverage point in dispensary SMS — but the wrong kind of growth (uncertain consent, no source attribution, low-quality incentives) creates a list that looks great on a count and underperforms on every metric that matters.
The four capture surfaces that actually work
1. POS opt-in at checkout
The highest-quality opt-in source in dispensary SMS. The customer is already at the counter, the disclosure can be shown on the budtender screen, and the engagement that follows is consistently the strongest. POS opt-ins should be the foundation of every program.
2. In-store keyword campaigns
Signage with a short keyword and a number (text JOIN to 12345) captures customers who don't want to interact at the counter. Double opt-in flow with age verification keeps the records clean.
3. Web opt-in widgets
Embedded forms on the menu page and footer with age gate and full disclosure. The conversion rate is lower than in-store, but the volume compounds over time and the records are clean.
4. Loyalty signup tied to SMS
Double-purpose the loyalty signup as the SMS signup with the right disclosures. This is the single most efficient growth lever for dispensaries that already run a loyalty program.
Compliant incentives
Incentives accelerate signup but have to stay inside both carrier rules and state-specific cannabis advertising rules. Safer patterns:
- "Get rewards updates and early access" (information-led, not discount-led)
- "First-visit welcome offer" (state-rule-dependent, often allowed)
- Loyalty point bonus for joining SMS (tied to the loyalty program, not the SMS message)
- "Be the first to know about restocks" (genuinely valued, not promo-stacked)
What kills list quality
- Pre-checked opt-in boxes (carrier-violating; audit-fatal)
- Bundling SMS opt-in into terms-of-service acceptance
- Importing lists from other channels without explicit re-permission
- Aggressive discount-only incentives that pull in subscribers who churn fast
- Missing or vague disclosure language at capture
The record fields you need
Per subscriber, regardless of source: timestamp, capture surface (keyword / URL / POS terminal / loyalty), IP address, age-verification state, and the exact disclosure language shown at opt-in. These are the fields carriers and regulators ask for during a review — and the only defense against a complaint is having them on file.