It only gets tricky when you want to have portability between SMS marketing vendors.
It's not uncommon for new restaurant customers to see quick results and want to start texting more than once a week. Fortunately, we
a) know the short-sightedness in that b) have a white glove experience where we have tight control over what gets texted and how frequently. The system automation is literally constrained to a weekly texting pace
Love the grouped offer suggestion. As a consumer that's more in line with my personal preferences. I think eventually this would be a nice feature in an effort to give the consumer power to customize their notification preferences.
There are laws against this unlike email.