Pick any business tactic using phone/SMS, and replace the nouns with other nouns. For example:

Papa John's sends me a text every Friday at 4pm, giving me a pizza coupon for the weekend. I suspect this drives a ridiculous increase in pizza orders for them.

What other business can send a coupon to a customer at a time they are likely to want it?

- Service for movie theaters to text concession coupons on Friday afternoons

- Service for web gift stores to text coupons to customers before holidays

- Service for restaurants to text daily coupon right before lunch