Loyalty + referral (Smile, LoyaltyLion, Yotpo) tied to sub tier, what works?

Three providers, all viable on Magento, picked by depth + scale:

• Smile.io, cheapest, simplest. $49, $599/mo. Points-for-purchase, referral codes, VIP tiers. Best fit: $250k, $3M brands wanting loyalty basics fast.
• LoyaltyLion, deeper customization, better Klaviyo integration. $399, $1,500/mo. Best fit: $2M, $15M brands with marketing teams who want to design custom point-earning behaviors.
• Yotpo Loyalty, bundled with Yotpo Reviews + Yotpo SMS, attractive if you already use Yotpo. $399, $1,500/mo. Best fit: brands already on the Yotpo stack.

The pattern that works for supplements:

• Points multiplier by sub tier. 1x for DTC one-time purchase, 2x for monthly subscriber, 3x for annual-prepay subscriber. Loyalty becomes the lever pulling customers up the sub-commitment ladder, not just a thank-you-for-buying mechanic.
• Sub-anniversary perks. Month 3: free shipping forever. Month 6: free travel pack. Month 12: free SKU swap. Anchors retention around tangible milestones.
• Referral “give $15, get $15”. Friendbuy or built-in Yotpo. Drives 18-25% of new-customer revenue at brands that promote it consistently (vs ~3% at brands that hide it). Pop-up on order confirmation page, post-purchase email, account dashboard.
• Tier unlock thresholds at GMV milestones. $250 lifetime spend → Silver (free shipping). $500 → Gold (early access to launches). $1,000 → Platinum (free SKU swap, surprise gifts). Most supplement subscribers hit Platinum within 18 months, designed to be reachable.

Don’t under-rotate to loyalty. At a $4M/yr supplements brand, well-run loyalty + referral drives ~$700k/yr of incremental revenue with ~$50k/yr program cost. 14x ROI is normal. The brands that under-invest here (no points, no referral, no tier) typically run 60%+ of their growth on paid ads, brutal CAC math.