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Re:Launch HN: Boostly (YC S22) – SMS marketing for restaurants by zbjornson on Thursday September 01, 2022 @11:08AM (#32677449)
Medical appointment reminders and other medical communications have a special cutout in the TCPA, including reduced consent requirements. They annoy me too though; they're redundant with my calendar reminders. The feedback SMS might not be included in the exception either.

https://blog.curogram.com/what-are-tcpa-and-traced-act-and-h...

Re:Launch HN: Boostly (YC S22) – SMS marketing for restaurants by shaneliammurphy on Thursday September 01, 2022 @11:22AM (#32677675)
You're correct. The TCPA's opt-in requirements are specific to ongoing marketing related texts and treat "transactional" texts differently.